Re: Re: heart attack rates vs BMI

[Guest guest]

I don't know if the data sets are normalized for nutrition, probably not.

BMI <24 group may be more likely to include individuals who are not getting

adequate nutrition.

JR

-----Original Message-----

From: Rodney [mailto:perspect1111@...]

Sent: Tuesday, October 19, 2004 12:00 PM

Subject: [ ] Re: heart attack rates vs BMI

Hi JW:

Now that is interesting, because it appears to be saying heart attack

rates are much lower in over weight men who exercise, than it is in

those who are of appropriate weight and exercise!!!

Do we believe that?

Rodney.

--- In , " jwwright " <jwwright@e...>

wrote:

> For example, et al. (23) report heart attack rates in men

with a BMI >= 27.0 of 7.3/1000 man-years in sedentary men and only

1.3/1000 man-years in regular vigorous exercisers. Corresponding

rates in men with a BMI < 24.0 were 5.5/1000 man-years in sedentary

men and 1.9/1000 man-years in regular vigorous exercisers.

>

> 23. , J. N., D. G. Clayton, M. G. Everitt, A. M. Semmence,

and E. H. Burgess. Exercise in leisure time: coronary attack and

death rates. Br. Heart J. 63: 325-334, 1990.

[Guest guest]

The only linear about humans is their thinking.

Visualize a surface where the 2 sets of data form 2 edges of the surface.

I don't compare the 1.3 to the 1.9 with each other, they are two diff sets of people, imperfect people.

Regards.

----- Original Message -----

From: Rodney

Sent: Tuesday, October 19, 2004 12:00 PM

Subject: [ ] Re: heart attack rates vs BMI

Hi JW:Now that is interesting, because it appears to be saying heart attack rates are much lower in over weight men who exercise, than it is in those who are of appropriate weight and exercise!!!Do we believe that?Rodney.> For example, et al. (23) report heart attack rates in men with a BMI >= 27.0 of 7.3/1000 man-years in sedentary men and only 1.3/1000 man-years in regular vigorous exercisers. Corresponding rates in men with a BMI < 24.0 were 5.5/1000 man-years in sedentary men and 1.9/1000 man-years in regular vigorous exercisers.> > 23. , J. N., D. G. Clayton, M. G. Everitt, A. M. Semmence, and E. H. Burgess. Exercise in leisure time: coronary attack and death rates. Br. Heart J. 63: 325-334, 1990.

[Guest guest]

Couldn't get the full text but the abstract is interesting:

Br Heart J. 1990 Jun;63(6):325-34.

Exercise in leisure time: coronary attack and death rates. JN, Clayton DG, Everitt MG, Semmence AM, Burgess EH.Department of Public Health and Policy, London School of Hygiene and Tropical Medicine.Nine thousand three hundred and seventy six male civil servants, aged 45-64 at entry, with no clinical history of coronary heart disease, were followed for a mean period of 9 years and 4 months during which 474 experienced a coronary attack. The 9% of men who reported that they often participated in vigorous sports or did considerable amounts of cycling or rated the pace of their regular walking as fast (over 4 mph, 6.4 km/h) experienced less than half the non-fatal and fatal coronary heart disease of the other men. In addition, entrants aged 55-64 who reported the next lower degree of this vigorous aerobic exercise had rates less than two thirds of the remainder; entrants of 45-54 did not show such an effect. When these forms of exercise were not vigorous they were no protection against the disease, nor were other forms of exercise or high totals of physical activity per se. A history of vigorous sports in the past was not protective. Indications in these men are of protection by specific exercise: vigorous, aerobic, with a threshold of intensity for benefit and "dose response" above this threshold, exercise that has to be habitual, and continuing, which suggests that protection is against the acute phases of the disease. Those men who took vigorous aerobic exercise were demonstrably a favourably "selected" group; they suffered less of the disease, however, whether at low risk or high by the several risk factors that were studied. Men with exercise-related reduction in coronary heart disease also had lower death rates from the total of other causes, and so lower total death rates than the rest of the men.PMID: 2375892

I think interesting is that only 5% experienced heart attacks.

Only 844, 9% did vigorous exercise and had < half the the CHD of the others. (231)

8532, 91% did not do vigorous exercise and had only 431 heart attacks.

That's a plus for exercise?

Fun with numbers.

Regards.

----- Original Message -----

From: Rodney

Sent: Tuesday, October 19, 2004 12:00 PM

Subject: [ ] Re: heart attack rates vs BMI

Hi JW:Now that is interesting, because it appears to be saying heart attack rates are much lower in over weight men who exercise, than it is in those who are of appropriate weight and exercise!!!Do we believe that?Rodney.> For example, et al. (23) report heart attack rates in men with a BMI >= 27.0 of 7.3/1000 man-years in sedentary men and only 1.3/1000 man-years in regular vigorous exercisers. Corresponding rates in men with a BMI < 24.0 were 5.5/1000 man-years in sedentary men and 1.9/1000 man-years in regular vigorous exercisers.> > 23. , J. N., D. G. Clayton, M. G. Everitt, A. M. Semmence, and E. H. Burgess. Exercise in leisure time: coronary attack and death rates. Br. Heart J. 63: 325-334, 1990.