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Table 2 Univariate analysis of socio-economic status and preterm birth

From: A matched case–control study of preterm birth in one hospital in Beijing, China

  Control Case OR 95% CI P
n % n %
Education
lower education 31 18.0 39 22.7 1   
higher education 141 82.0 133 77.3 0.72 0.41-1.27 0.260
Family income(dollars, per month)
 ≥1000 78 45.3 70 40.7 1   
 <1000 94 54.7 102 59.3 1.31 0.79-2.18 0.303
Family living space (m2, per person)
 ≥20 123 71.5 106 61.6 1   
 <20 49 28.5 66 38.4 1.90 1.09-3.30 0.024