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Table 1 Crude and adjusted odds ratios for the effect of gravidity as a multi-level variable, age, wealth index and relationship status on placental malaria, adjusted for confounders, estimated by logistic regression in Ghanaian women aged 14–49 (N = 1808)

From: Assessing the relationship between gravidity and placental malaria among pregnant women in a high transmission area in Ghana

Variable Category Crude model Fully adjusted modela
OR (95% CI) P-value (LRT) OR (95% CI) P-value (LRT)
Gravidity MG (Ref.) < 0.001 (Ref.) < 0.001 
SG 2.24 (1.73–2.88) 1.67 (1.24–2.25)
PG 5.37 (4.08–7.07) 3.36 (2.39–4.71)
Age < 18 (Ref.) (Ref.)
18–25 0.36 (0.26–0.51)   0.66 (0.45–0.96)  
25–49 0.14 (0.10–0.21)   0.43 (0.27–0.67)  
Wealth index Least poor (Ref.)   (Ref.)  
Less poor 1.12 (0.82–1.53)   1.10 (0.78–1.54)  
Poor 1.40 (1.02–1.90)   1.48 (1.06–2.07)  
More poor 2.08 (1.53–2.84)   2.14 (1.53–2.98)  
Extremely poor 1.59 (1.17–2.17)   1.93 (1.38–2.69)  
Relationship status Married (Ref.)   (Ref.)  
Living together 1.97 (1.60–2.42)   1.25 (0.99–1.59)  
Widowed/divorced/separated 1.90 (0.98–3.71)   0.91 (0.44–1.87)  
Single 3.40 (2.36–4.88)   1.38 (0.91–2.09)  
  1. LRT Likelihood ratio test, MG multigravidae; PG primigravidae
  2. aModel adjusted for age group, wealth index and relationship status