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Table 2 binary regression of the factors associated with preterm delivery

From: Folic acid level and preterm birth among Sudanese women

Variables OR 95% CI P
Age, years 1.03 0.94–1.13 0.485
Parity 0.93 0.72–1.20 0.589
Education < secondary level 1.26 0.68–2.31 0.454
Housewives 0.78 0.29–2.11 0.633
History of miscarriage 0.84 0.27–2.57 0.768
Lack of antennal care 1.40 0.62–3.17 0.415
Body mass index, k/m2 0.95 0.84–1.08 0.503
Hemoglobin level, g/dl 0.78 0.45–1.34 0.373
Interpregnancy interval, months 1.06 1.00–1.12 0.049
Folic acid level 0.64 0.53–0.77 < 0.001