Table 1 Baseline characteristics of the study population according to Body Mass Index.
From: Body Mass Index and Mortality: A 10-Year Prospective Study in China
Characteristics | Body Mass Indexa | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
<15.0 | 15.0–17.4 | 17.5–19.9 | 20.0–22.4 | 22.5–24.9 | 25.0–27.4 | 27.5–29.9 | 30.0–32.4 | 32.5–34.9 | ≥35.0 | P values | |
No. of participants | 210 | 3384 | 37326 | 140462 | 131610 | 43693 | 12257 | 3082 | 588 | 181 | |
Age at baseline (years), median (IQR) | 57.0 (41.0,74.0) | 53.0 (35.0,68.0) | 43.0 (32.0, 58.0) | 42.0 (33.0, 54.0) | 45.0 (36.0,55.0) | 49.0 (40.0,57.0) | 52.0 (42.0,59.0) | 53.0 (43.0,60.0) | 55.0 (46.0,62.0) | 54.0 (46.0,62.0) | <0.001b |
BMI (kg/m2), median (IQR) | 14.3 (13.7,14.7) | 16.9 (16.4,17.3) | 19.3 (18.7,19.6) | 21.5 (20.8, 22.0) | 23.5 (23.0,24.2) | 25.9 (25.4,26.6) | 28.3 (27.8,29.0) | 30.9 (30.4,31.5) | 33.3 (32.9,34.1) | 36.1 (35.4,37.2) | <0.001b |
Marital status, No. (%) | |||||||||||
Married | 155 (73.8) | 2586 (76.4) | 29865 (80.0) | 118038 (84.0) | 114862 (87.3) | 38464 (88.0) | 10775 (87.9) | 2676 (86.8) | 491 (83.5) | 161 (89.0) | <0.001 |
Others | 55 (26.2) | 798 (23.6) | 7461 (20.0) | 22424 (16.0) | 16748 (12.7) | 5229 (12.0) | 1482 (12.1) | 406 (13.2) | 97 (16.5) | 20 (11.0) | |
Education, No. (%) | |||||||||||
Less than 6 years | 132 (62.9) | 1850 (54.7) | 16261 (43.6) | 57724 (41.1) | 60868 (46.3) | 24369 (55.8) | 7651 (62.4) | 2079 (67.5) | 416 (70.8) | 133 (73.5) | <0.001 |
≥ 6 years | 78 (37.1) | 1534 (45.3) | 21065 (56.4) | 82738 (58.9) | 70742 (53.7) | 19324 (44.2) | 4606 (37.6) | 1003 (32.5) | 172 (29.2) | 48 (26.5) | |
Smoking, No. (%) | |||||||||||
Never | 174(84.1) | 2728(81.0) | 29173(78.7) | 104776(75.1) | 95084(72.7) | 31694(72.8) | 8903(73.0) | 2361(77.0) | 497(84.8) | 166(92.2) | <0.001 |
Former | 10(4.8) | 187(5.6) | 1687(4.5) | 6429(4.7) | 7012(5.3) | 3057(7.0) | 1032(8.5) | 254(8.3) | 32(5.5) | 5(2.8) | |
Current | 23(11.1) | 451(13.4) | 6229(16.8) | 28202(20.2) | 28773(22.0) | 8763(20.1) | 2264(18.5) | 450(14.7) | 57(9.7) | 9(5.0) | |
Drinking, No. (%) | |||||||||||
Never | 185(89.4) | 2942(87.4) | 31381(84.6) | 112981(81.0) | 102451(78.3) | 33674(77.4) | 9443(77.5) | 2511(82.0) | 519(88.7) | 170(94.5) | <0.001 |
Occasional | 7(3.4) | 138(4.1) | 1838(5.0) | 8588(6.2) | 8450(6.5) | 2654(6.1) | 739(6.0) | 134(4.4) | 22(3.8) | 6(3.3) | |
Often | 15(7.2) | 286(8.5) | 3859(10.4) | 17842(12.8) | 19923(15.2) | 7159(16.5) | 2008(16.5) | 416(13.6) | 44(7.5) | 4(2.2) | |
Physical activity, No. (%) | |||||||||||
Less than 1 time/ week | 74(36.8) | 1091(33.0) | 10738(29.2) | 38026(27.4) | 34692(26.7) | 11128(25.7) | 3082(25.5) | 753(24.8) | 142(24.4) | 38(21.5) | <0.001 |
1 to 4 times/ week | 72(35.8) | 1122(33.9) | 11989(32.6) | 43515(31.4) | 42735(32.8) | 15463(35.8) | 4276(35.4) | 1113(36.7) | 217(37.3) | 65(36.7) | |
More than 4 times/ week | 55(27.4) | 1092(33.1) | 14002(38.1) | 57076(41.2) | 52669(40.5) | 16630(38.5) | 4725(39.1) | 1169(38.5) | 223(38.3) | 74(41.8) | |
