Table 1.
Baseline characteristic of the study populations according to the accumulated number of underweight
| Accumulated number of being underweight | ||||||
|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | p value | |
| 2,248,457 (93.8) | 50,077 (2.08) | 28,559 (1.19) | 25,597 (1.06) | 43,744 (1.82) | < 0.0001 | |
| Age | 43 (34 − 5) | 34 (29–45) | 32 (28–43) | 32 (28–39) | 32 (28–39) | < 0.0001 |
| 20–39 | 1,016,130 (45.19) | 33,524 (66.94) | 20,523 (71.86) | 19,236 (75.15) | 33,418 (76.39) | |
| 40–64 | 1,188,218 (52.85) | 15,798 (31.55) | 7663 (26.83) | 6049 (23.63) | 9803 (22.41) | |
| 65≥ | 44,109 (1.96) | 755 (1.51) | 373 (1.31) | 312 (1.22) | 523 (1.2) | |
| Sex | < 0.0001 | |||||
| Male | 1,722,635 (76.61) | 23,537 (47) | 12,016 (42.07) | 10,199 (39.84) | 16,720 (38.22) | |
| Female | 525,822 (23.39) | 26,540 (53) | 16,543 (57.93) | 15,398 (60.16) | 27,024 (61.78) | |
| Smoking | < 0.0001 | |||||
| Non | 986,840 (43.89) | 30,893 (61.69) | 18,459 (64.63) | 16,888 (65.98) | 29,400 (67.21) | |
| Ex | 463,362 (20.61) | 5134 (10.25) | 2611 (9.14) | 1964 (7.67) | 3040 (6.95) | |
| Current | 798,255 (35.5) | 14,050 (28.06) | 7489 (26.22) | 6745 (26.35) | 11,304 (25.84) | |
| Drink | < 0.0001 | |||||
| Non | 846,399 (37.64) | 24,188 (48.3) | 14,259 (49.93) | 13,031 (50.91) | 22,566 (51.59) | |
| Mild | 1,214,930 (54.03) | 23,561 (47.05) | 13,157 (46.07) | 11,528 (45.04) | 19,637 (44.89) | |
| Heavy | 187,128 (8.32) | 2328 (4.65) | 1143 (4) | 1038 (4.06) | 1541 (3.52) | |
| DM | 164,746 (7.33) | 1588 (3.17) | 745 (2.61) | 590 (2.3) | 836 (1.91) | < 0.0001 |
| HTN | 448,078 (19.93) | 3389 (6.77) | 1500 (5.25) | 1169 (4.57) | 1735 (3.97) | < 0.0001 |
| Dyslipidemia | 363,881 (16.18) | 3155 (6.3) | 1526 (5.34) | 1357 (5.3) | 1549 (3.54) | < 0.0001 |
| WC | 81 (76–87) | 69 (66–74) | 68 (64–72) | 67 (63–71) | 65 (62–69) | < 0.0001 |
| BMI | 23.8 (21,94-25.78) | 19.05 (18.51–19.77) | 18.59 (18.18–19.1) | 18.25 (17.78–18.67) | 17.47 (16.9-17.94) | < 0.0001 |
Data are expressed as number (%) of subjects or median (IQR)
DM Diabetes mellitus, HTN Hypertension, WC Waist circumference, BMI Body mass index