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Table 1 Demographic characteristics of the cases and controls (n (%))

From: Maternal deaths among rural–urban migrants in China: a case–control study

Items Cases (N = 124) Controls (N = 496) Chi-square test Pvalue
Age group     
  ≤19 years old 6 (5.5) 7 (1.6) 18.6 <0.001
  20-34 years old 62 (56.9) 333 (76.4)   
  ≥ 35 years old 41 (37.6) 96 (22.0)   
Education level     
  Primary school 54 (50.0) 75 (17.2) 57.9 <0.001
  Junior high school 44 (40.7) 218 (50.0)   
  Senior high school or above 10 (9.3) 143 (32.8)   
Marital status     
  Unmarried or divorced 23 (21.1) 35 (8.0) 15.7 0.001
  Married 86 (78.9) 401 (92.0)   
Gravidity     
  0 218 (16.7) 109 (25.0) 8.6 0.013
  1-2 68 (63.0) 206 (47.2)   
  ≥3 22 (20.4) 121 (27.8)   
Parity     
  0 35 (32.4) 198 (45.4) 18.3 <0.001
  1 63 (58.3) 230 (52.8)   
  ≥2 10 (9.3) 8 (1.8)   
  1. †: Data missing for 1 case.