Table 2 Factors associated with changes in BMI categories during the study.

From: Impact of weight changes on the incidence of diabetes mellitus: a Korean nationwide cohort study

2002 NonOB P1 OB P2 P3
2006 NonOB OB NonOB OB
n 32326 3682 2801 12596
Age ≥ 65 yrs 1216 (3.8) 139 (3.8) 0.968 111 (4.0) 404 (3.2) 0.044 0.028
Female (%) 11090 (34.3) 815 (22.1) <0.001 797 (28.5) 2629 (20.9) <0.001 <0.001
BMI (kg/m2) 21.8 ± 1.9 24.0 ± 1.0 <0.001 25.9 ± 1.5 27.2 ± 1.8 <0.001 <0.001
SBP (mmHg) 120.6 ± 14.6 126.0 ± 14.5 <0.001 124.2 ± 14.7 128.3 ± 15.0 <0.001 <0.001
DBP (mmHg) 75.9 ± 9.9 79.2 ± 9.9 <0.001 77.9 ± 9.9 80.9 ± 10.2 <0.001 <0.001
FBG (mg/dL) 91.3 ± 15.3 93.6 ± 15.4 <0.001 94.3 ± 21.5 95.8 ± 18.7 <0.001 <0.001
TC (mg/dL) 190.6 ± 34.4 202.0 ± 36.5 <0.001 195.3 ± 36.4 203.6 ± 35.7 <0.001 <0.001
Smoking (%)    <0.001    <0.001 <0.001
No 18664 (65.3) 1873 (59.3)   1635 (66.0) 6423 (59.1)   
Past 1949 (6.8) 317 (10.0)   204 (8.2) 958 (8.8)   
Current 7958 (27.9) 970 (30.7)   638 (25.8) 3480 (32.0)   
Alcohol (%)    <0.001    <0.001 <0.001
No & <1/week 22057 (70.5) 2252(63.3)   1866 (68.8) 7678 (62.8)   
≥1/week 9231 (29.5) 1308 (36.7)   848 (31.3) 4550 (37.2)   
Exercise    <0.001    <0.001 <0.001
No 15242 (48.2) 1606 (44.5)   1051 (38.2) 5084 (41.2)   
≤4/week 14430 (45.6) 1795 (49.7)   1372 (49.9) 6342 (51.4)   
≥5/week 1958 (6.2) 209 (5.8)   329 (12.0) 915 (7.4)   
Low income (%) 2679 (8.3) 289 (7.9) 0.359 271 (9.7) 1098 (8.7) 0.107 <0.001
Family Hx. of HTN (%) 2707 (9.3) 369 (11.0) 0.001 279 (10.9) 1310 (11.5) 0.407 <0.001
Family Hx. of stroke (%) 1612 (5.5) 175 (5.2) 0.506 137 (5.4) 690 (6.0) 0.187 0.117
Family Hx. of CAD (%) 812 (2.8) 97 (2.9) 0.681 72 (2.8) 314 (2.8) 0.866 0.975
Family Hx. of DM (%) 2125 (7.2) 241 (7.2) 0.897 218 (8.5) 935 (8.2) 0.589 0.002
Family Hx. of cancer (%) 4175 (14.2) 432 (12.9) 0.042 343 (13.3) 1538 (13.4) 0.936 0.055
Incident diabetes (%) 1075 (3.3) 192 (5.2) <0.001 207 (7.4) 1275 (10.1) <0.001 <0.001