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Table 1 Basic characteristics of 1340 cases and 2662 controls in southern China

From: Association of stress management skills and stressful life events with allergy risk: a case-control study in southern China

Variable participants without self-reported illness or injurya P participants with self-reported illness or injurya P
Cases
N(%)
Controls
N(%)
Cases
N(%)
Controls
N(%)
Age (year, mean ± SD) 28.25 ± 9.46 28.10 ± 9.26 0.658 26.90 ± 8.14 25.63 ± 7.80 0.104
Sex    0.528    0.165
 Male 509(46.0) 1110(44.9)   92(39.3) 87(46.0)  
 Female 597(54.0) 1363(55.1)   142(60.7) 102(54.0)  
Education    0.829    0.953
 Compulsory school 73(6.6) 177(7.2)   10(4.3) 7(41.2)  
 High school graduate 341(30.8) 754(30.5)   57(24.4) 47(24.9)  
 University/college degree 692(62.6) 1542(62.4)   167(71.4) 135(71.4)  
BMI (kg/m2)    0.062    0.895
 <18.5 187(16.9) 486(19.7)   52(22.2) 40(21.2)  
 18.5–23.9 734(66.4) 1628(65.8)   151(64.5) 126(66.7)  
  ≥ 24 185(16.7) 359(14.5)   31(13.2) 23(12.2)  
Smoking status    0.113    0.626
 Never 945(85.4) 2161(87.4)   207(88.5) 170(89.9)  
 Current/Former 161(14.6) 312(12.6)   27(11.5) 19(10.1)  
Alcohol intake    0.145    0.096
 Never 324(29.3) 804(32.5)   53(22.6) 53(28.0)  
 Sometimes 757(68.4) 1621(65.5)   174(74.4) 135(43.7)  
 Often/always 25(2.3) 48(1.9)   7(3.0) 1(0.5)  
Physical activityb    <0.001    0.185
 Rarely/never 275(24.9) 454(18.4)   58(24.8) 33(17.5)  
 Sometimes 483(43.7) 1049(42.4)   96(41.0) 87(46.0)  
 Often/always 348(31.5) 970(39.2)   80(34.2) 69(36.5)  
  1. aSelf-reported illness or injury: personal injury or illness as one kind of life event, but not serious because people with serious or chronic diseases are excluded at the beginning of the research. bVigorous physical activity in leisure-time exercise. Values of P for age were calculated using the independent-samples t test; and others using the chi-squared test. Significant differences are highlighted in bold