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Table 1 The comparison of investigation variables between case group and control group

From: Familial aggregation and heritability of hypertension in Han population in Shanghai China: a case-control study

  Control group Case group x p
Sex male 175 171 0.119 0.730
female 167 171
Education Illiteracy 20 22 6.567 0.161
Primary School 84 83
Junior High 133 154
High School 69 67
College/above 34 18
Blood type unknown 135 126 3.523 0.620
A 50 58
B 49 55
O 65 72
AB 41 33
Character unknown 3 9 4.252 0.373
introversion 143 143
partial introversion 100 104
extroversion 46 48
partial extroversion 49 39
Work pressure not 217 222 3.08 0.545
little 96 86
big 23 24
very big 4 8
Occupation physical 154 152   
mental 90 71 12.197 0.016
freelance 26 17   
no work 70 104   
Sleep time inadequate 43 35   
sometimes adequate 30 50 6.998 0.072
adequate 268 259   
Exercise Never 63 65   
Occasionally 116 130 1.454 0.483
Often 162 148   
Drink Never 236 251   
Occasionally 65 59 2.068 0.558
Often 38 34   
Smoking never 225 219   
quit 22 40 6.544 0.088
occasionally 20 24   
always 72 61   
Diet salty 65 88 5.738 0.057
light 104 110   
balanced 172 146