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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