Table 3.
Characteristics of included subjects in CHNS 1991–2015.
| Characteristic | 1991–2015 combined (15,143) | 1991 (2,429) | 1993 (2,254) | 1997 (2,254) | 2000 (2,217) | 2004 (1,364) | 2006 (1,145) | 2009 1,012 | 2011 (1,404) | 2015 (1,064) |
|---|---|---|---|---|---|---|---|---|---|---|
| AGE GROUP | ||||||||||
| 7–12 years | 8,783 (58.00) | 1,335 (54.96) | 1,285 (57.01) | 1,358 (60.25) | 1,207 (54.44) | 646 (47.36) | 667 (58.25) | 618 (61.07) | 874 (62.25) | 793 (74.53) |
| 13–17 years | 6,360 (42.00) | 1,094 (45.04) | 969 (42.99) | 896 (39.75) | 1,010 (45.56) | 718 (52.64) | 478 (41.75) | 394 (38.93) | 530 (37.75) | 271 (25.47) |
| SEX | ||||||||||
| Male | 7,947 (52.48) | 1,251 (51.50) | 1,175 (52.13) | 1,192 (52.88) | 1,176 (53.04) | 720 (52.79) | 609 (53.19) | 562 (55.53) | 713 (50.78) | 549 (51.60) |
| Female | 7,196 (47.52) | 1,178 (48.50) | 1,079 (47.87) | 1,062 (47.12) | 1,041 (46.96) | 644 (47.21) | 536 (46.81) | 450 (44.47) | 691 (49.22) | 515 (48.40) |
| ANTHROPOMETRIC MEASURES | ||||||||||
| Height, cm | 144.65 ± 0.26 | 142.37 ± 0.64 | 142.11 ± 0.68 | 142.62 ± 0.65 | 146.41 ± 0.63 | 149.05 ± 0.86 | 146.04 ± 1.00 | 146.44 ± 0.99 | 146.47 ± 0.88 | 144.55 ± 0.97 |
| Weight, kg | 38.18 ± 0.21 | 36.39 ± 0.49 | 36.05 ± 0.50 | 36.55 ± 0.50 | 38.89 ± 0.50 | 41.33 ± 0.69 | 39.12 ± 0.77 | 39.29 ± 0.82 | 40.67 ± 0.77 | 39.35 ± 0.96 |
| BMI, kg/m2 | 17.69 ± 0.05 | 17.38 ± 0.11 | 17.28 ± 0.12 | 17.43 ± 0.11 | 17.68 ± 0.11 | 18.10 ± 0.15 | 17.77 ± 0.18 | 17.79 ± 0.20 | 18.35 ± 0.20 | 18.28 ± 0.34 |
| WC, cm | 62.87 ± 0.19 | NA | 62.39 ± 0.47 | 61.39 ± 0.35 | 62.80 ± 0.35 | 64.10 ± 0.50 | 62.52 ± 0.58 | 63.07 ± 0.62 | 64.49 ± 0.63 | 63.03 ± 0.83 |
| BLOOD PRESSURE MEASURES | ||||||||||
| SBP, mmHg | 98.44 ± 0.20 | 96.18 ± 0.53 | 96.34 ± 0.54 | 97.18 ± 0.53 | 99.49 ± 0.54 | 101.53 ± 0.70 | 98.00 ± 0.73 | 99.83 ± 0.78 | 100.12 ± 0.65 | 101.54 ± 0.76 |
| DBP, mmHg | 64.57 ± 0.15 | 62.61 ± 0.39 | 63.25 ± 0.41 | 63.67 ± 0.40 | 65.15 ± 0.39 | 66.66 ± 0.51 | 64.74 ± 0.52 | 66.63 ± 0.57 | 65.36 ± 0.47 | 66.65 ± 0.55 |
| SETTING | ||||||||||
| Urban | 4,347 (28.71) | 620 (25.52) | 566 (25.11) | 659 (29.24) | 609 (27.47) | 408 (29.91) | 343 (29.96) | 274 (27.08) | 530 (37.75) | 338 (31.77) |
| Rural | 10,796 (71.29) | 1,809 (74.48) | 1,688 (74.89) | 1,595 (70.76) | 1,608 (72.53) | 956 (70.09) | 802 (70.04) | 738 (72.92) | 874 (62.25) | 726 (68.23) |
| REGION | ||||||||||
| North | 5,286 (34.91) | 728 (29.97) | 698 (30.97) | 776 (34.43) | 964 (43.48) | 556 (40.76) | 445 (38.86) | 375 (37.06) | 442 (31.48) | 302 (28.38) |
| South | 9,857 (65.09) | 1,701 (70.03) | 1,556 (69.03) | 1,478 (65.57) | 1,253 (56.52) | 808 (59.24) | 700 (61.14) | 637 (62.94) | 962 (68.52) | 762 (71.62) |
*Data are expressed as n (%) or mean ± SD; BMI, body mass index; WC, Waist circumference; SBP, systolic blood pressure; DBP, diastolic blood pressure. NA, Not available.