Table 1.
Age-adjusted characteristics of the study population at baseline by quintile of total vitamin E intake
| Quintile of Vitamin E Intake | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |
| Health Professionals Follow-up Study, 1986-2010 | n=10003 | n=9701 | n=9890 | n=9794 | n=9834 |
| Age, years* | 53.1(9.6) | 53.7(9.7) | 54.8(9.8) | 55.4(10.0) | 56.9(9.6) |
| Body mass index, kg/m2 | 25.7(3.3) | 25.7(3.3) | 25.7(3.6) | 25.4(3.3) | 25.2(3.2) |
| Current smoker, % | 13 | 10 | 8 | 9 | 9 |
| Past smoker, % | 42 | 44 | 44 | 46 | 44 |
| Caucasian, % | 95 | 96 | 95 | 96 | 96 |
| Activity, met-h/week | 15.4(22.8) | 17.5(24.4) | 19.6(26.9) | 20.0(26.6) | 21.3(29.3) |
| Coffee, servings/day | 1.5(1.7) | 1.4(1.6) | 1.3(1.6) | 1.3(1.5) | 1.1(1.5) |
| Alcohol, g/day | 13.6(18.4) | 10.7(14.5) | 10.4(14.0) | 10.9(14.7) | 11.3(15.3) |
| Total energy intake, kcal/day | 1730(529) | 1980(575) | 2171(634) | 2086(648) | 1961(614) |
| Nurses’ Health Study, 1984-2008 | n=15553 | n=16842 | n=16150 | n=16072 | n=16147 |
| Age, years* | 50.1(7.2) | 50.4(7.2) | 50.9(7.1) | 51.3(7.3) | 52.1(6.9) |
| Body mass index, kg/m2 | 25.8(5.0) | 26.1(5.1) | 26.3(5.1) | 25.7(4.8) | 25.4(4.7) |
| Current smoker, % | 32 | 25 | 22 | 22 | 21 |
| Past smoker, % | 27 | 30 | 33 | 34 | 35 |
| Caucasian, % | 98 | 98 | 97 | 98 | 98 |
| Activity, met-h/week | 10.7(16.8) | 12.6(18.7) | 14.8(21.2) | 15.5(22.1) | 16.7(24.2) |
| Coffee, servings/day | 1.9(1.8) | 1.9(1.8) | 1.8(1.8) | 1.7(1.7) | 1.6(1.7) |
| Alcohol, g/day | 7.8(13.4) | 6.5(10.4) | 6.5(10.3) | 6.8(11.0) | 6.9(11.0) |
| Total energy intake, kcal/day | 1495(447) | 1743(478) | 1935(534) | 1839(545) | 1702(528) |
Values are means(SD) or percentages and are standardized to the age distribution of the study population.
a Metabolic equivalents from recreational and leisure-time activities
*
Value is not age-adjusted