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Table 2 Logistic regression analysis for LBW and its determinants

From: Correlates of low birth weight in term pregnancies: a retrospective study from Iran

  Crude ORs Adjusted ORs *
  OR (95% CI) OR (95% CI)
Maternal age (at child birth) 0.96 (0.94–0.99) 0.96 (0.92–1.00)
Maternal education   
University 1.0 (ref.) 1.0 (ref.)
Illiterate and primary 3.87 (0.93–16.00) 3.32 (0.79–13.94)
Secondary and high school 4.29 (1.05–17.54) 3.44 (0.83–14.25)
Number of parities 0.98 (0.86–1.12) 1.01 (0.85–1.20)
History of LBW deliveries   
No 1.0 (ref.) 1.0 (ref.)
Yes 1.94 (1.07–3.51) 2.53 (1.06–6.03)
History of pre term labor   
No 1.0 (ref.) 1.0 (ref.)
Yes 1.41 (0.70–2.84) 0.65 (0.23–1.81)
Cigarette smoking   
No 1.0 (ref.) 1.0 (ref.)
Yes 3.74 (1.63–8.54) 4.64 (1.97–10.95)
Chronic diseases   
None 1.0 (ref.) 1.0 (ref.)
Hypertension 3.11 (1.93–5.02) 3.70 (2.25–6.06)
Others 1.91 (1.03–3.53) 2.04 (1.09–3.83)
Residence   
Tehran 1.0 (ref.) 1.0 (ref.)
Suburbs of Tehran 1.41 (1.04–1.92) 1.24 (0.90–1.71)
  1. * Adjusted for all variables studied in one model.