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Table 2 Bivariate conditional logistic regression analysis of the proportion of cases and controls with predicted risk factors for maternal death (n (%))

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

Items Cases (N = 109) Controls (N = 436) Crude OR 95% CI
Income per month <2000 RMB 47 (44.3) 46 (10.7) 9.63** 5.13-18.05
No health insurance 87 (89.7) 220 (53.1) 1.19** 1.08-1.30
No planned pregnancy 66 (60.6) 144 (33.0) 3.75** 2.33-6.04
Not knowing to register the pregnancy 69 (63.3) 120 (27.5) 5.72** 3.49-9.39
Not knowing to attend antenatal care (ANC) 38 (34.9) 31 (7.1) 11.36** 5.59-23.12
Not knowing the danger signs of delivery 64 (58.7) 53 (12.2) 11.30** 6.55-19.50
Not knowing the recommendation to deliver in hospital 30 (27.5) 9 (2.1) 22.13** 8.56-57.21
Not received reminder to register the pregnancy 73 (67.0) 176 (40.4) 3.42** 2.14-5.48
Not received follow-up reminders to attend ANC 69 (63.3) 126 (28.9) 4.88** 3.02-7.89
No decision on ANC attendance made by woman 42 (38.5) 38 (8.7) 7.33** 4.17-12.89
Not registered in healthcare system 76 (69.7) 92 (21.1) 12.06** 6.81-21.37
Times of ANC     
  0 49 (45.0) 22 (5.0) 27.34** 11.65-64.17
  1-4 46 (42.2) 164 (37.6) 1.24 0.79-1.95
  ≥ 5 14 (12.8) 25 (57.3) 0.06** 0.03-0.12
Complications during pregnancy§ 19(23.5) 60 (18.5 ) 1.39 0.75-2.57
Mode of delivery§     
  Vaginal 34 (42.0) 216 (66.7) 0.35** 0.21-0.59
  Assisted vaginal 8 (9.9) 9 (2.8) 4.05** 1.45-11.31
  Cesarean section 34 (42.0) 97 (29.9) 1.73* 1.03-2.89
  1. §: Excludes women who died before delivery, then cases = 81, controls = 324.
  2. *: p < 0.05; **: p < 0.01.