Table 5.
Relationship between physical activity level at registry entry and subject characteristics (1993–2004)
| Total kcalories per week at enrollment
|
P value for linear trendb | ||||
|---|---|---|---|---|---|
| <1,000 (n = 910) | 1,000 to <2,250 (n = 934) | 2,250 to <3,500 (n = 779) | 3,500+ (n = 968) | ||
| Agea | 49.39 ± 13.02 | 47.94 ± 12.74 | 45.51 ± 11.97 | 44.35 ± 11.26 | <0.0001 |
| Gender | 0.002c | ||||
| Female | 78.4% | 78.5% | 73.9% | 72.4% | |
| Male | 21.6% | 21.5% | 26.1% | 27.6% | |
| Ethnicity | 0.751d | ||||
| White | 95.6% | 95.6% | 96.1% | 94.7% | |
| African American | 2.3% | 2.3% | 1.7% | 1.8% | |
| Asian | 0.1% | 0.2% | 0.4% | 0.4% | |
| Hispanic | 1.1% | 1.1% | 1.2% | 1.8% | |
| Other | 0.9% | 0.9% | 0.6% | 1.3% | |
| Marital status | <0.0001d | ||||
| Married | |||||
| Separated | 66.5% | 64.7% | 65.7% | 61.1% | |
| Divorced | 1.2% | 2.4% | 1.8% | 1.4% | |
| Widowed | 12.0% | 12.4% | 10.4% | 11.1% | |
| Never married | 5.2% | 3.5% | 2.1% | 2.0% | |
| Not married (living with significant other) | 12.0% 2.7% |
13.0% 3.4% |
15.6% 3.6% |
18.5% 4.2% |
|
| Other | 0.4% | 0.5% | 0.9% | 1.7% | |
| Education level | <0.0001d | ||||
| Grade school | 0.0% | 0.0% | 0.0% | 0.0% | |
| Junior high school | 0.2% | 0.2% | 0.3% | 0.0% | |
| High school | 15.3 | 10.3% | 7.2% | 6.5% | |
| Vocational training | 7.9% | 5.6% | 4.2% | 5.3% | |
| Some college (<4 years) | 27.2% | 22.8% | 21.2% | 22.2% | |
| College/university degree | 23.9% | 26.1% | 29.6% | 30.7% | |
| Graduate or professional | 25.4% | 35.0% | 37.5% | 35.3% | |
| Enrollment weight (kg)e | 73.47 ± 0.48 | 71.93 ± 0.47 | 70.98 ± 0.52 | 70.12 ± 0.46 | <0.0001 |
| Enrollment BMI (kg/m2)e | 25.77 ± 0.15 | 25.20 ± 0.15 | 24.68 ± 0.17 | 24.51 ± 0.15 | <0.0001 |
| Maximum pre-enrollment weight (kg)e | 104.33 ± 0.83 | 103.75 ± 0.81 | 103.51 ± 0.89 | 105.14 ± 0.80 | 0.553 |
| Maximum pre-enrollment BMI (kg/m2)e | 36.69 ± 0.27 | 36.36 ± 0.27 | 36.05 ± 0.29 | 36.76 ± 0.27 | 0.940 |
| Weight change (maximum-enrollment, kg)e | 30.86 ± 0.55 | 31.82 ± 0.54 | 32.07 ± 0.60 | 35.02 ± 0.54 | <0.0001 |
| Weight maintenance duration (months)e | 67.26 ± 2.90 | 65.96 ± 2.85 | 68.95 ± 3.14 | 70.22 ± 2.82 | 0.359 |
a
Data reported as mean ± s.d.
b
P-values calculated from a general linear model with polynomial contrasts unless otherwise specified.
c
P-values calculated from logistic regression model with polynomial contrasts.
d
Pearson’s chi-square P value.
e
Data reported as mean ± standard error, adjusted to the sample mean age and proportion male.