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Table 1 Basic characteristic of participants in this study

From: Risk factors for prehypertension and their interactive effect: a cross- sectional survey in China

Variables Normotension (N = 741) Prehypertension (N = 603) Hypertension(N = 433) P a
Gender (%)     < 0.01b
 Male 255(34.41) 280(46.43) 213(49.19)  
 Female 486(65.59) 323(53.57) 220(50.81)  
Age (years) 59.67 ± 11.34 61.15 ± 11.41 62.31 ± 10.64 < 0.01c
Educational level (%)     0.03c
 Elementary level or lower 233(31.44) 189(31.34) 168(38.80)  
 Middle school graduate 276(37.25) 221(36.65) 146(33.72)  
 High school graduate or higher 232(31.31) 193(32.01) 119(27.48)  
Marital status (%)     0.73b
 Currently married 621(83.81) 506(83.91) 370(85.45)  
 Currently not married 120(16.19) 97(16.09) 63(14.55)  
Income (yuan) (%)     0.26c
 0–2000 419(56.55) 315(52.24) 230(53.12)  
 2000–4000 288(38.87) 256(42.45) 185(42.73)  
  > 4000 34(4.58) 32(5.31) 18(4.15)  
Smoking (%)     < 0.01b
 No 573(77.33) 394(65.34) 284(65.59)  
 Yes 168(22.67) 209(34.66) 149(34.41)  
Family history of cardiovascular diseases (%)     < 0.01b
 No 608(82.1) 458(75.95) 322(74.36)  
 Yes 133(17.9) 145(24.05) 111(25.64)  
General obesity (%)     < 0.01b
 No 660(89.05) 505(83.75) 324(74.83)  
 Yes 81(10.95) 98(16.25) 109(25.17)  
Abdominal obesity (%)     < 0.01b
 No 502(67.75) 304(50.41) 151(34.87)  
 Yes 238(32.25) 299(49.59) 282(65.13)  
LAP (%)     < 0.01c
 Q1 226(30.50) 113(18.74) 42(9.70)  
 Q2 215(29.01) 118(19.57) 92(21.25)  
 Q3 182(24.56) 154(25.54) 119(27.48)  
 Q4 118(15.93) 218(36.15) 180(41.57)  
  1. a:Comparisons of variables between normotension, prehypertension and hypertension members
  2. b:Chi-squared test
  3. c: Kruskal-Wallis H test