Research Article

Association of Obesity and Hypertension: A Cohort Study in China

Table 1

Characteristics of the eight waves of survey.

All participants1993 (n = 6583)1997 (n = 7363)2000 (n = 8061)2004 (n = 8212)2006 (n = 8020)2009 (n = 8318)2011 (n = 11059)2015 (n = 9128)

Sex (%)
Male3109 (47.23)3582 (48.65)3845 (47.7)4067 (49.53)3946 (49.2)4061 (48.82)5297 (47.9)4203 (46.05)
Female3474 (52.77)3781 (51.35)4216 (52.3)4145 (50.47)4074 (50.8)4257 (51.18)5762 (52.1)4925 (53.95)
Age, M (IQR)38.00 (28.00, 48.00)40.00 (29.00, 49.00)41.00 (31.00, 50.00)44.00 (34.00, 53.00)45.00 (36.00, 54.00)46.00 (37.00, 55.00)47.00 (38.00, 56.00)50.00 (40.00, 58.00)

Marriage status (%)
Married5262 (80.36)5945 (81.29)6469 (83.22)7048 (86.16)7029 (87.71)7264 (87.37)9710 (87.84)8212 (89.97)
Single/divorced/widowed1272 (19.43)1367 (18.69)1301 (16.74)1127 (13.78)971 (12.12)1017 (12.23)1289 (11.66)898 (9.84)
Unknown14 (0.21)1 (0.01)3 (0.04)5 (0.06)14 (0.17)33 (0.4)55 (0.5)17 (0.19)

Urbanicity (%)
Urban2076 (31.54)2573 (34.94)2648 (32.85)2656 (32.34)2501 (31.18)2570 (30.9)4313 (39)3433 (37.61)
Rural4507 (68.46)4790 (65.06)5413 (67.15)5556 (67.66)5519 (68.82)5748 (69.1)6746 (61)5695 (62.39)

Education (%)
Low3573 (54.28)4138 (56.2)4755 (58.99)4918 (59.89)4363 (54.4)4816 (57.9)5668 (51.25)5640 (61.79)
Middle1044 (15.86)1316 (17.87)1567 (19.44)1767 (21.52)1822 (22.72)1706 (20.51)2438 (22.05)2192 (24.01)
High117 (1.78)192 (2.61)347 (4.3)324 (3.95)437 (5.45)445 (5.35)1429 (12.92)1284 (14.07)
Unknown1849 (28.09)1717 (23.32)1392 (17.27)1203 (14.65)1398 (17.43)1351 (16.24)1524 (13.78)12 (0.13)

Smoking (%)
Never0009(0.11)9(0.11)1(0.01)1(0.01)1(0.01)
Former17(0.26)19(0.26)40(0.50)227(2.76)257(3.20)225(2.70)388(3.51)194(2.13)
Current2114(32.11)2348(31.89)2453(30.43)2526(30.76)2361(29.44)2464(29.62)3083(27.88)2213(24.24)
Alcohol (%)2390(36.31)2723(36.98)2834(35.16)2923(35.59)2800(34.91)2993(35.98)4093(37.01)2645(28.98)
Weight, M (IQR)55.00 (50.00, 61.70)56.50 (50.90, 63.50)58.30 (52.00, 65.10)59.20 (52.50, 66.50)60.00 (53.00, 67.00)60.40 (53.80, 68.38)61.90 (55.00, 70.00)62.80 (55.50, 71.20)
Height, M (IQR)160.00 (154.10, 166.00)160.10 (154.80, 166.55)160.80 (155.10, 167.10)161.00 (155.50, 167.50)161.30 (156.00, 168.00)162.00 (156.00, 168.00)162.00 (156.20, 168.30)161.90 (156.00, 168.00)
WC, M (IQR)74.00 (69.00, 81.00)76.00 (71.00, 83.00)78.00 (72.00, 85.00)80.00 (73.27, 87.00)80.00 (74.00, 87.00)82.00 (75.00, 89.00)83.00 (76.00, 90.30)84.20 (77.00, 92.00)
HC, M (IQR)89.00 (85.00, 94.00)91.00 (86.00, 96.00)93.00 (88.00, 98.00)93.00 (88.00, 98.00)93.00 (88.50, 98.00)94.00 (89.00, 99.20)95.00 (90.00, 100.00)95.30 (90.20, 100.30)
Incoming, Mean ± SD2263.35 ± 2175.665212.44 ± 3886.576918.96 ± 8610.283674.05 ± 8151.154742.14 ± 12251.477974.06 ± 19723.3114079.23 ± 27782.7428255.24 ± 225484.21

WC stands for waist circumference, HC stands for hip circumference, M stands for median.