Table 1.
Baseline Characteristics of Study Participants by Body Mass Index (BMI) and Waist-Hip Ratio (WHR) in the Shanghai Women's Health Study, 1996-2013
| Characteristic | BMI Categories |
P | ||||
|---|---|---|---|---|---|---|
| 18.5-22.9 | 23.0-24.9 | 25.0-27.4 | 27.5-29.9 | ≥30.0 | ||
| Number (%) | 26,689 (39.1) | 16,807 (24.6) | 14,481 (21.2) | 6,742 (9.9) | 3,534 (5.2) | |
| Age at baseline (years, median, (25th, 75th percentile)) |
47.3 (43.2, 55.6) |
49.9 (44.4, 59.5) |
52.7 (46.1, 62.5) |
55.3 (47.5, 64.0) |
57.8 (49.1, 64.9) |
<0.001 |
| Education (%) ab | <0.001 | |||||
| Elementary school or lower | 16.1 | 19.1 | 22.1 | 26.2 | 29.9 | |
| High school | 36.3 | 37.8 | 39.4 | 42.0 | 43.7 | |
| High school graduate | 30.9 | 28.7 | 26.7 | 22.5 | 19.7 | |
| Some college or higher | 16.8 | 14.4 | 11.7 | 9.4 | 6.7 | |
| Postmenopausal women (%) b | 47.6 | 48.3 | 48.4 | 49.1 | 49.8 | <0.001 |
| Total energy intake (kcal/day) b | 1,639.5 | 1,662.3 | 1,675.1 | 1,703.4 | 1,727.8 | <0.001 |
| Total meat intake (g/day) b | 63.4 | 64.4 | 64.1 | 64.2 | 63.6 | 0.218 |
| Total fruit/vegetables intake (g/day) b | 529.7 | 556.5 | 563.2 | 571.8 | 560.3 | <0.001 |
| Physical activity, regularly (yes, %) b | 35.1 | 36.2 | 34.4 | 33.0 | 33.7 | <0.001 |
| Leisure-time Physical activity (MET- h/week) b |
5.61 | 5.73 | 5.56 | 5.61 | 5.42 | 0.441 |
| Regular alcohol consumption (ever, %) b | 2.0 | 2.1 | 2.0 | 1.7 | 1.8 | 0.624 |
| Spouse smoking exposure (ever, %) b | 53.4 | 54.6 | 56.6 | 57.1 | 59.4 | <0.001 |
| Positive family history of cancer (%) b | 26.2 | 26.6 | 27.7 | 27.0 | 26.4 | 0.026 |
|
| ||||||
| Characteristic | WHR Quintile Categories |
P | ||||
| Q1 (lowest) | Q2 | Q3 | Q4 | Q5 (highest) | ||
|
| ||||||
| Number (%) | 12,056 (17.7) | 14,748 (21.6) | 15,932 (23.3) | 12,263 (18.0) | 13,254 (19.4) | |
| Age (years, median, 25th, 75th percentile) | 46.3 (43.0, 52.9) |
47.9 (43.6, 55.6) |
49.7 (44.4, 59.0) |
52.5 (45.6, 62.2) |
58.0 (48.7, 65.0) |
<0.001 |
| Education (%) ab | <0.001 | |||||
| Elementary school or lower | 15.6 | 16.8 | 19.3 | 21.8 | 25.7 | |
| High school | 35.8 | 37.0 | 37.9 | 39.7 | 40.8 | |
| High school graduate | 31.0 | 30.3 | 28.9 | 26.2 | 24.1 | |
| Some college or higher | 17.7 | 15.9 | 14.0 | 12.3 | 9.5 | |
| Postmenopausal women (%) b | 46.8 | 47.5 | 48.1 | 48.8 | 50.2 | <0.001 |
| Total energy intake (kcal/day) b | 1,658.3 | 1,656.0 | 1,659.6 | 1,669.0 | 1,680.3 | <0.001 |
| Total meat intake (g/day) b | 64.4 | 64.4 | 63.6 | 63.9 | 63.5 | 0.294 |
| Total fruit/vegetables intake (g/day) b | 556.5 | 551.6 | 550.8 | 549.1 | 543.8 | 0.018 |
| Physical activity, regularly (yes, %) b | 37.6 | 35.8 | 35.0 | 33.5 | 33.0 | <0.001 |
| Leisure-time Physical activity (MET- h/week) b |
6.15 | 5.72 | 5.48 | 5.50 | 5.37 | <0.001 |
| Regular alcohol consumption (ever, %) b | 1.8 | 1.8 | 2.1 | 2.1 | 1.9 | 0.134 |
| Spouse smoking exposure (ever, %) b | 52.6 | 53.7 | 55.1 | 56.6 | 57.5 | <0.001 |
| Positive family history of cancer (%) b | 26.3 | 26.9 | 27.2 | 26.9 | 26.3 | 0.140 |
a
May not sum up to 1 due to rounding
b
Adjusted for age distribution