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THE NEW YORK TIMES' Health Column has published today, July 30, 2006, an in-depth feature by
Gina Kolata on
THE NEW AGE - Older & Better, the first in a series on the Science of Ageing.
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The 21st-century Keller Family. Craig and Sandy, seated at center, with daughters Kristy Harden, left, and Rachel. Rear: Kim Werk, Craig’s sister; Dennis, his brother; and Priscilla Keller Reynolds, his mother.
Richard Perry/The New York Times.
Valentin Keller enlisted in an all-German unit of the Union Army in Hamilton, Ohio, in 1862. He was 26, a small, slender man, 5 feet 4 inches tall, who had just become a naturalized citizen. He listed his occupation as tailor.
A year later, Keller was honorably discharged, sick and broken. He had a lung ailment and was so crippled from arthritis in his hips that he could barely walk.
His pension record tells of his suffering. “His rheumatism is so that he is unable to walk without the aid of crutches and then only with great pain,” it says. His lungs and his joints never got better, and Keller never worked again.
He died at age 41 of “dropsy,” which probably meant that he had congestive heart failure, a condition not associated with his time in the Army. His 39-year-old wife, Otilia, died a month before him of what her death certificate said was “exhaustion.”
People of Valentin Keller’s era, like those before and after them, expected to develop chronic diseases by their 40’s or 50’s. Keller’s descendants had lung problems, they had heart problems, they had liver problems. They died in their 50’s or 60’s.
Now, though, life has changed. The family’s baby boomers are reaching middle age and beyond and are doing fine.
“I feel good,” says Keller’s great-great-great-grandson Craig Keller. At 45, Mr. Keller says he has no health problems, nor does his 45-year-old wife, Sandy.
The Keller family illustrates what may prove to be one of the most striking shifts in human existence — a change from small, relatively weak and sickly people to humans who are so big and robust that their ancestors seem almost unrecognizable.
New research from around the world has begun to reveal a picture of humans today that is so different from what it was in the past that scientists say they are startled. Over the past 100 years, says one researcher, Robert W. Fogel of the University of Chicago, humans in the industrialized world have undergone “a form of evolution that is unique not only to humankind, but unique among the 7,000 or so generations of humans who have ever inhabited the earth.”
The difference does not involve changes in genes, as far as is known, but changes in the human form. It shows up in several ways, from those that are well known and almost taken for granted, like greater heights and longer lives, to ones that are emerging only from comparisons of health records.
The biggest surprise emerging from the new studies is that many chronic ailments like heart disease, lung disease and arthritis are occurring an average of 10 to 25 years later than they used to. There is also less disability among older people today, according to a federal study that directly measures it. And that is not just because medical treatments like cataract surgery keep people functioning. Human bodies are simply not breaking down the way they did before.
Even the human mind seems improved. The average I.Q. has been increasing for decades, and at least one study found that a person’s chances of having dementia in old age appeared to have fallen in recent years.
The proposed reasons are as unexpected as the changes themselves. Improved medical care is only part of the explanation; studies suggest that the effects seem to have been set in motion by events early in life, even in the womb, that show up in middle and old age.
“What happens before the age of 2 has a permanent, lasting effect on your health, and that includes aging,” said Dr. David J. P. Barker, a professor of medicine at Oregon Health and Science University in Portland and a professor of epidemiology at the University of Southampton in England.
Each event can touch off others. Less cardiovascular disease, for example, can mean less dementia in old age. The reason is that cardiovascular disease can precipitate mini-strokes, which can cause dementia. Cardiovascular disease is also a suspected risk factor for Alzheimer’s disease.
The effects are not just in the United States. Large and careful studies from Finland, Britain, France, Sweden and the Netherlands all confirm that the same things have happened there; they are also beginning to show up in the underdeveloped world.
Of course, there were people in previous generations who lived long and healthy lives, and there are people today whose lives are cut short by disease or who suffer for years with chronic ailments. But on average, the changes, researchers say, are huge.
Even more obvious differences surprise scientists by the extent of the change.
In 1900, 13 percent of people who were 65 could expect to see 85. Now, nearly half of 65-year-olds can expect to live that long.
People even look different today. American men, for example, are nearly three inches taller than they were 100 years ago and about 50 pounds heavier.
“We’ve been transformed,” Dr. Fogel said.
What next? scientists ask. Today’s middle-aged people are the first generation to grow up with childhood vaccines and with antibiotics. Early life for them was much better than it was for their parents, whose early life, in turn, was much better than it was for their parents.
And if good health and nutrition early in life are major factors in determining health in middle and old age, that bodes well for middle-aged people today. Investigators predict that they may live longer and with less pain and misery than any previous generation.
“Will old age for today’s baby boomers be anything like the old age we think we know?” Dr. Barker asked. “The answer is no.”
Trying to Change a Pattern
Craig Keller does not know what to expect of his old age. But he is optimistic by nature, and he knows he has already lived past the life span of his beleaguered ancestor Valentin. He is 5-foot-9, 200 pounds and exuberantly healthy.
He grew up in Hamilton, the same town on the Kentucky border where Valentin lived, worshiped and was buried. And he still lives there, working as a court bailiff, married to Sandy, whom he met when they were in second grade. Now, married 25 years, the Kellers have two grown daughters, a lively black dog and no complaints.
Craig and Sandy Keller had all the advantages of middle-class Americans of their age: childhood vaccines, plenty of food, antibiotics when they fell ill. Now, wanting to stay healthy, they walk in the evenings, try to eat well and rely on their strong faith, which, they say, makes a big difference to their health. And they enjoy life.
Mr. Keller pulls his wife’s tan Chevy Malibu into the driveway of his small, immaculate house on a sidewalk-lined street. It is the same house that he grew up in; he and Mrs. Keller bought it from Mr. Keller’s parents 22 years ago. While Mrs. Keller brings out a snack of a homemade cheese ball, crackers, sandwiches, fruit salad and brownies, Mr. Keller settles in to marvel at the contrast between his comfortable life and the lives of his ancestors.
For him, the idea of falling ill in his late 20’s and never working again is unimaginable. He knows, though, that he is nearing the age when many of his ancestors died. His father, Carl D. Keller, a lifelong smoker, developed prostate cancer, then emphysema, and then lung cancer, which killed him at age 65. His father’s father, Carl W. Keller, also a smoker, died of cancer of the esophagus just after he turned 69. His grandfather on his mother’s side died of cirrhosis of the liver at 55; his grandmother died at 56 of breast cancer.
“They never got out of their 50’s and 60’s,” Mr. Keller said. “So that’s kind of in the back of your mind.” He worries about his lungs, given his family history. He had pneumonia once and has had bronchitis.
But, Mr. Keller reasons, he is so physically different from his ancestors — he has never smoked and is so much healthier, so much better fed — that he really thinks he will break the spell.
And if exercise is good for health, the Kellers certainly have exercised. Mr. Keller displays a bookcase in their basement, crammed with athletic trophies. Mrs. Keller’s are from baton twirling, Mr. Keller’s are from baseball, basketball, softball and soccer. Their daughters, 19-year-old Rachel and 22-year-old Kristy, got theirs cheerleading.
Mrs. Keller said that when she was her daughters’ age, “I didn’t think about my health very much.”
“But later in my 30’s and toward my 40’s,” she said, “I started to think about it. You try to eat right, you try to exercise. And you do see your parents with illnesses. And you wonder about yourself. My mom had a quadruple bypass when she was 75, and she had to have a pacemaker after that. She’s now in her 80’s, but you do wonder.”
Was it genetic destiny or health habits that caused her mother’s heart disease? Mrs. Keller asks herself. Her mother smoked for more than a decade, finally quitting with great difficulty before Mrs. Keller was born. “She said the Lord helped her,” Mrs. Keller said.
Mrs. Keller has never smoked. Concerned about heart disease, she had her cholesterol level tested a few years ago and now takes medication to lower it. She walks at lunch with the women in her office and after dinner with her husband.
Her daughter Rachel, petite and quiet with a quick smile, is already thinking about her family’s medical history. She worries about heart disease, worries about lung disease. She has already had her cholesterol level measured — it was normal. And she is shocked when people her age start smoking.
“In high school, none of my friends smoked,” she said. “They came back from their first year in college, and all of them did.”
“It’s hard to think about getting old when you’re young,” Rachel added. “But when you see your family members — my grandpa died of lung cancer, my grandparents on both sides had cancer. So it’s on my mind a lot of times.”
But still, the future is so distant it is almost unfathomable to her. “I wonder what we’re going to be like when we’re old,” she mused.
Lives Plagued by Illness
Scientists used to say that the reason people are living so long these days is that medicine is keeping them alive, though debilitated. But studies like one Dr. Fogel directs, of Union Army veterans, have led many to rethink that notion.
The study involves a random sample of about 50,000 Union Army veterans. Dr. Fogel compared those men, the first generation to reach age 65 in the 20th century, with people born more recently.
The researchers focused on common diseases that are diagnosed in pretty much the same way now as they were in the last century. So they looked at ailments like arthritis, back pain and various kinds of heart disease that can be detected by listening to the heart.
The first surprise was just how sick people were, and for how long.
Instead of inferring health from causes of death on death certificates, Dr. Fogel and his colleagues looked at health throughout life. They used the daily military history of each regiment in which each veteran served, which showed who was sick and for how long; census manuscripts; public health records; pension records; doctors’ certificates showing the results of periodic examinations of the pensioners; and death certificates.
They discovered that almost everyone of the Civil War generation was plagued by life-sapping illnesses, suffering for decades. And these were not some unusual subset of American men — 65 percent of the male population ages 18 to 25 signed up to serve in the Union Army. “They presumably thought they were fit enough to serve,” Dr. Fogel said.
Even teenagers were ill. Eighty percent of the male population ages 16 to 19 tried to sign up for the Union Army in 1861, but one out of six was rejected because he was deemed disabled.
And the Union Army was not very picky. “Incontinence of urine alone is not grounds for dismissal,” said Dora Costa, an M.I.T. economist who works with Dr. Fogel, quoting from the regulations. A man who was blind in his right eye was disqualified from serving because that was his musket eye. But, Dr. Costa said, “blindness in the left eye was O.K.”
After the war ended, as the veterans entered middle age, they were rarely spared chronic ailments.
“In the pension records there were descriptions of hernias as big as grapefruits,” Dr. Costa said. “They were held in by a truss. These guys were continuing to work although they clearly were in a lot of pain. They just had to cope.”
Eighty percent had heart disease by the time they were 60, compared with less than 50 percent today. By ages 65 to 74, 55 percent of the Union Army veterans had back problems. The comparable figure today is 35 percent.
The steadily improving health of recent generations shows up in population after population and country after country. But these findings raise a fundamental question, Dr. Costa said.
“The question is, O.K., there are these differences, and yes, they are big. But why?” she said.
“That’s the million-dollar question,” said David M. Cutler, a health economist at Harvard. “Maybe it’s the trillion-dollar question. And there is not a received answer that everybody agrees with.”
Outgrowing the Past
Don Hotchkiss, a civil engineer in Las Vegas and a descendant of Civil War veterans, is an avid Civil War re-enactor. Early on, he and his brother tried to sleep in an exact replica of one of the old tents.
It was too small, Mr. Hotchkiss said. He is six feet tall and stocky. His brother, a police officer in Phoenix, is thinner, but 6-foot-2. The tents were made for men who were average size then. “In the past 145 years, we’ve ballooned up,” Mr. Hotchkiss said.
At a recent meeting of a Las Vegas chapter of the Sons of Confederate Veterans, eight burly men crowded into a library meeting room. All had experienced the equivalent of the Civil War tent problem.
“At the re-enactments, all the directors, all the costume directors say the re-enactors are just too darn big,” said George McClendon, a hefty 67-year-old retired airline pilot.
Mr. McClendon is right. Men living in the Civil War era had an average height of 5-foot-7 and weighed an average of 147 pounds. That translates into a body mass index of 23, well within the range deemed “normal.” Today, men average 5-foot-9½ and weigh an average of 191 pounds, giving them an average body mass index of 28.2, overweight and edging toward obesity.
Those changes, along with the great improvements in general health and life expectancy in recent years, intrigued Dr. Costa. Common chronic diseases — respiratory problems, valvular heart disease, arteriosclerosis, and joint and back problems — have been declining by about 0.7 percent a year since the turn of the 20th century. And when they do occur, they emerge at older ages and are less severe.
The reasons, she and others are finding, seem to have a lot to do with conditions early in life. Poor nutrition in early years is associated with short stature and lifelong ill health, and until recently, food was expensive in the United States and Europe.
Copyright 2006 The New York Times Company
The 21st-century Keller Family. Craig and Sandy, seated at center, with daughters Kristy Harden, left, and Rachel. Rear: Kim Werk, Craig’s sister; Dennis, his brother; and Priscilla Keller Reynolds, his mother.
Richard Perry/The New York Times.
Valentin Keller enlisted in an all-German unit of the Union Army in Hamilton, Ohio, in 1862. He was 26, a small, slender man, 5 feet 4 inches tall, who had just become a naturalized citizen. He listed his occupation as tailor.
A year later, Keller was honorably discharged, sick and broken. He had a lung ailment and was so crippled from arthritis in his hips that he could barely walk.
His pension record tells of his suffering. “His rheumatism is so that he is unable to walk without the aid of crutches and then only with great pain,” it says. His lungs and his joints never got better, and Keller never worked again.
He died at age 41 of “dropsy,” which probably meant that he had congestive heart failure, a condition not associated with his time in the Army. His 39-year-old wife, Otilia, died a month before him of what her death certificate said was “exhaustion.”
People of Valentin Keller’s era, like those before and after them, expected to develop chronic diseases by their 40’s or 50’s. Keller’s descendants had lung problems, they had heart problems, they had liver problems. They died in their 50’s or 60’s.
Now, though, life has changed. The family’s baby boomers are reaching middle age and beyond and are doing fine.
“I feel good,” says Keller’s great-great-great-grandson Craig Keller. At 45, Mr. Keller says he has no health problems, nor does his 45-year-old wife, Sandy.
The Keller family illustrates what may prove to be one of the most striking shifts in human existence — a change from small, relatively weak and sickly people to humans who are so big and robust that their ancestors seem almost unrecognizable.
New research from around the world has begun to reveal a picture of humans today that is so different from what it was in the past that scientists say they are startled. Over the past 100 years, says one researcher, Robert W. Fogel of the University of Chicago, humans in the industrialized world have undergone “a form of evolution that is unique not only to humankind, but unique among the 7,000 or so generations of humans who have ever inhabited the earth.”
The difference does not involve changes in genes, as far as is known, but changes in the human form. It shows up in several ways, from those that are well known and almost taken for granted, like greater heights and longer lives, to ones that are emerging only from comparisons of health records.
The biggest surprise emerging from the new studies is that many chronic ailments like heart disease, lung disease and arthritis are occurring an average of 10 to 25 years later than they used to. There is also less disability among older people today, according to a federal study that directly measures it. And that is not just because medical treatments like cataract surgery keep people functioning. Human bodies are simply not breaking down the way they did before.
Even the human mind seems improved. The average I.Q. has been increasing for decades, and at least one study found that a person’s chances of having dementia in old age appeared to have fallen in recent years.
The proposed reasons are as unexpected as the changes themselves. Improved medical care is only part of the explanation; studies suggest that the effects seem to have been set in motion by events early in life, even in the womb, that show up in middle and old age.
“What happens before the age of 2 has a permanent, lasting effect on your health, and that includes aging,” said Dr. David J. P. Barker, a professor of medicine at Oregon Health and Science University in Portland and a professor of epidemiology at the University of Southampton in England.
Each event can touch off others. Less cardiovascular disease, for example, can mean less dementia in old age. The reason is that cardiovascular disease can precipitate mini-strokes, which can cause dementia. Cardiovascular disease is also a suspected risk factor for Alzheimer’s disease.
The effects are not just in the United States. Large and careful studies from Finland, Britain, France, Sweden and the Netherlands all confirm that the same things have happened there; they are also beginning to show up in the underdeveloped world.
Of course, there were people in previous generations who lived long and healthy lives, and there are people today whose lives are cut short by disease or who suffer for years with chronic ailments. But on average, the changes, researchers say, are huge.
Even more obvious differences surprise scientists by the extent of the change.
In 1900, 13 percent of people who were 65 could expect to see 85. Now, nearly half of 65-year-olds can expect to live that long.
People even look different today. American men, for example, are nearly three inches taller than they were 100 years ago and about 50 pounds heavier.
“We’ve been transformed,” Dr. Fogel said.
What next? scientists ask. Today’s middle-aged people are the first generation to grow up with childhood vaccines and with antibiotics. Early life for them was much better than it was for their parents, whose early life, in turn, was much better than it was for their parents.
And if good health and nutrition early in life are major factors in determining health in middle and old age, that bodes well for middle-aged people today. Investigators predict that they may live longer and with less pain and misery than any previous generation.
“Will old age for today’s baby boomers be anything like the old age we think we know?” Dr. Barker asked. “The answer is no.”
Trying to Change a Pattern
Craig Keller does not know what to expect of his old age. But he is optimistic by nature, and he knows he has already lived past the life span of his beleaguered ancestor Valentin. He is 5-foot-9, 200 pounds and exuberantly healthy.
He grew up in Hamilton, the same town on the Kentucky border where Valentin lived, worshiped and was buried. And he still lives there, working as a court bailiff, married to Sandy, whom he met when they were in second grade. Now, married 25 years, the Kellers have two grown daughters, a lively black dog and no complaints.
Craig and Sandy Keller had all the advantages of middle-class Americans of their age: childhood vaccines, plenty of food, antibiotics when they fell ill. Now, wanting to stay healthy, they walk in the evenings, try to eat well and rely on their strong faith, which, they say, makes a big difference to their health. And they enjoy life.
Mr. Keller pulls his wife’s tan Chevy Malibu into the driveway of his small, immaculate house on a sidewalk-lined street. It is the same house that he grew up in; he and Mrs. Keller bought it from Mr. Keller’s parents 22 years ago. While Mrs. Keller brings out a snack of a homemade cheese ball, crackers, sandwiches, fruit salad and brownies, Mr. Keller settles in to marvel at the contrast between his comfortable life and the lives of his ancestors.
For him, the idea of falling ill in his late 20’s and never working again is unimaginable. He knows, though, that he is nearing the age when many of his ancestors died. His father, Carl D. Keller, a lifelong smoker, developed prostate cancer, then emphysema, and then lung cancer, which killed him at age 65. His father’s father, Carl W. Keller, also a smoker, died of cancer of the esophagus just after he turned 69. His grandfather on his mother’s side died of cirrhosis of the liver at 55; his grandmother died at 56 of breast cancer.
“They never got out of their 50’s and 60’s,” Mr. Keller said. “So that’s kind of in the back of your mind.” He worries about his lungs, given his family history. He had pneumonia once and has had bronchitis.
But, Mr. Keller reasons, he is so physically different from his ancestors — he has never smoked and is so much healthier, so much better fed — that he really thinks he will break the spell.
And if exercise is good for health, the Kellers certainly have exercised. Mr. Keller displays a bookcase in their basement, crammed with athletic trophies. Mrs. Keller’s are from baton twirling, Mr. Keller’s are from baseball, basketball, softball and soccer. Their daughters, 19-year-old Rachel and 22-year-old Kristy, got theirs cheerleading.
Mrs. Keller said that when she was her daughters’ age, “I didn’t think about my health very much.”
“But later in my 30’s and toward my 40’s,” she said, “I started to think about it. You try to eat right, you try to exercise. And you do see your parents with illnesses. And you wonder about yourself. My mom had a quadruple bypass when she was 75, and she had to have a pacemaker after that. She’s now in her 80’s, but you do wonder.”
Was it genetic destiny or health habits that caused her mother’s heart disease? Mrs. Keller asks herself. Her mother smoked for more than a decade, finally quitting with great difficulty before Mrs. Keller was born. “She said the Lord helped her,” Mrs. Keller said.
Mrs. Keller has never smoked. Concerned about heart disease, she had her cholesterol level tested a few years ago and now takes medication to lower it. She walks at lunch with the women in her office and after dinner with her husband.
Her daughter Rachel, petite and quiet with a quick smile, is already thinking about her family’s medical history. She worries about heart disease, worries about lung disease. She has already had her cholesterol level measured — it was normal. And she is shocked when people her age start smoking.
“In high school, none of my friends smoked,” she said. “They came back from their first year in college, and all of them did.”
“It’s hard to think about getting old when you’re young,” Rachel added. “But when you see your family members — my grandpa died of lung cancer, my grandparents on both sides had cancer. So it’s on my mind a lot of times.”
But still, the future is so distant it is almost unfathomable to her. “I wonder what we’re going to be like when we’re old,” she mused.
Lives Plagued by Illness
Scientists used to say that the reason people are living so long these days is that medicine is keeping them alive, though debilitated. But studies like one Dr. Fogel directs, of Union Army veterans, have led many to rethink that notion.
The study involves a random sample of about 50,000 Union Army veterans. Dr. Fogel compared those men, the first generation to reach age 65 in the 20th century, with people born more recently.
The researchers focused on common diseases that are diagnosed in pretty much the same way now as they were in the last century. So they looked at ailments like arthritis, back pain and various kinds of heart disease that can be detected by listening to the heart.
The first surprise was just how sick people were, and for how long.
Instead of inferring health from causes of death on death certificates, Dr. Fogel and his colleagues looked at health throughout life. They used the daily military history of each regiment in which each veteran served, which showed who was sick and for how long; census manuscripts; public health records; pension records; doctors’ certificates showing the results of periodic examinations of the pensioners; and death certificates.
They discovered that almost everyone of the Civil War generation was plagued by life-sapping illnesses, suffering for decades. And these were not some unusual subset of American men — 65 percent of the male population ages 18 to 25 signed up to serve in the Union Army. “They presumably thought they were fit enough to serve,” Dr. Fogel said.
Even teenagers were ill. Eighty percent of the male population ages 16 to 19 tried to sign up for the Union Army in 1861, but one out of six was rejected because he was deemed disabled.
And the Union Army was not very picky. “Incontinence of urine alone is not grounds for dismissal,” said Dora Costa, an M.I.T. economist who works with Dr. Fogel, quoting from the regulations. A man who was blind in his right eye was disqualified from serving because that was his musket eye. But, Dr. Costa said, “blindness in the left eye was O.K.”
After the war ended, as the veterans entered middle age, they were rarely spared chronic ailments.
“In the pension records there were descriptions of hernias as big as grapefruits,” Dr. Costa said. “They were held in by a truss. These guys were continuing to work although they clearly were in a lot of pain. They just had to cope.”
Eighty percent had heart disease by the time they were 60, compared with less than 50 percent today. By ages 65 to 74, 55 percent of the Union Army veterans had back problems. The comparable figure today is 35 percent.
The steadily improving health of recent generations shows up in population after population and country after country. But these findings raise a fundamental question, Dr. Costa said.
“The question is, O.K., there are these differences, and yes, they are big. But why?” she said.
“That’s the million-dollar question,” said David M. Cutler, a health economist at Harvard. “Maybe it’s the trillion-dollar question. And there is not a received answer that everybody agrees with.”
Outgrowing the Past
Don Hotchkiss, a civil engineer in Las Vegas and a descendant of Civil War veterans, is an avid Civil War re-enactor. Early on, he and his brother tried to sleep in an exact replica of one of the old tents.
It was too small, Mr. Hotchkiss said. He is six feet tall and stocky. His brother, a police officer in Phoenix, is thinner, but 6-foot-2. The tents were made for men who were average size then. “In the past 145 years, we’ve ballooned up,” Mr. Hotchkiss said.
At a recent meeting of a Las Vegas chapter of the Sons of Confederate Veterans, eight burly men crowded into a library meeting room. All had experienced the equivalent of the Civil War tent problem.
“At the re-enactments, all the directors, all the costume directors say the re-enactors are just too darn big,” said George McClendon, a hefty 67-year-old retired airline pilot.
Mr. McClendon is right. Men living in the Civil War era had an average height of 5-foot-7 and weighed an average of 147 pounds. That translates into a body mass index of 23, well within the range deemed “normal.” Today, men average 5-foot-9½ and weigh an average of 191 pounds, giving them an average body mass index of 28.2, overweight and edging toward obesity.
Those changes, along with the great improvements in general health and life expectancy in recent years, intrigued Dr. Costa. Common chronic diseases — respiratory problems, valvular heart disease, arteriosclerosis, and joint and back problems — have been declining by about 0.7 percent a year since the turn of the 20th century. And when they do occur, they emerge at older ages and are less severe.
The reasons, she and others are finding, seem to have a lot to do with conditions early in life. Poor nutrition in early years is associated with short stature and lifelong ill health, and until recently, food was expensive in the United States and Europe.
Copyright 2006 The New York Times Company
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