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. 2017 Apr 6;8:43–56. doi: 10.2147/PROM.S122420

Table 2.

Comparison of the five multivariate regression models using our Malawi data

Variables Linear
Log med
Log plan
LMUP all
LMUP 3
Model comparison
β-Coefficient 95% CI OR 95% CI OR 95% CI OR 95% CI OR 95% CI
Mother’s age, years 18–29 as baseline
15–17 −1.10 −1.56 to −0.63 0.54 0.40 to 0.74 0.54 0.39 to 0.74 0.60 0.47 to 0.76 0.50 0.37 to 0.66 Same
≥30 0.39 0.00 to 0.78 1.32 1.02 to 1.71 1.36 1.05 to 1.76 1.25 1.02 to 1.52 1.24 0.99 to 1.54 Different
Father’s age, years 20–29 as baseline
15–19 −1.44 −2.10 to −0.78 0.45 0.29 to 0.69 0.43 0.28 to 0.69 0.47 0.34 to 0.65 0.40 0.27 to 0.59 Same
≥30 0.48 0.16 to 0.81 1.22 0.98 to 1.51 1.33 1.07 to 1.65 1.26 1.07 to 1.49 1.29 1.07 to 1.55 Different
Mother’s education level, years −0.01 −0.05 to 0.03 0.98 0.95 to 1.01 0.96 0.94 to 0.99 1.00 0.97 to 1.02 0.98 0.96 to 1.01 Different
Father’s education level, years −0.03 −0.06 to 0.01 0.98 0.96 to 1.00 0.98 0.96 to 1.01 0.99 0.97 to 1.01 0.98 0.96 to 1.00 Same
Unmarried −3.71 −4.16 to −3.25 0.10 0.07 to 0.15 0.10 0.07 to 0.15 0.15 0.12 to 0.20 0.11 0.08 to 0.14 Same
Number of live children −0.76 −0.87 to −0.64 0.61 0.57 to 0.66 0.62 0.57 to 0.68 0.70 0.66 to 0.74 0.68 0.64 to 0.73 Same
Birth interval First birth as baseline
Within 24 months −2.07 −2.45 to −1.68 0.35 0.27 to 0.45 0.26 0.20 to 0.34 0.37 0.30 to 0.45 0.28 0.22 to 0.35 Same
2–3 years −0.74 −1.14 to −0.34 0.79 0.60 to 1.04 0.49 0.38 to 0.65 0.66 0.54 to 0.81 0.52 0.41 to 0.66 Different
More than 3 years 0.33 −0.08 to 0.74 1.72 1.29 to 2.30 0.87 0.66 to 1.15 1.05 0.86 to 1.29 0.88 0.68 to 1.12 Different
Gestation, months −0.06 −0.13 to 0.01 0.97 0.92 to 1.02 0.97 0.92 to 1.02 0.99 0.95 to 1.02 0.97 0.93 to 1.01 Same
Socioeconomic status Poorest 20% as baseline
Second-poorest 20% −0.13 −0.49 to 0.22 0.86 0.68 to 1.08 0.82 0.65 to 1.04 0.90 0.75 to 1.07 0.89 0.72 to 1.09 Same
Middle 20% −0.13 −0.49 to 0.22 0.87 0.69 to 1.10 0.82 0.64 to 1.04 0.88 0.74 to 1.05 0.92 0.75 to 1.14
Next-richest 20% 0.31 −0.04 to 0.67 1.07 0.84 to 1.36 1.03 0.81 to 1.31 1.05 0.88 to 1.26 1.09 0.89 to 1.34
Richest 20% 0.33 −0.05 to 0.71 1.01 0.78 to 1.31 0.97 0.74 to 1.25 1.02 0.84 to 1.24 1.02 0.81 to 1.27
Previous depression None as baseline
1 or ≤2 weeks −0.85 −1.17 to −0.54 0.55 0.44 to 0.67 0.52 0.42 to 0.64 0.62 0.53 to 0.73 0.59 0.49 to 0.71 Same
1 or ≥2 weeks −1.34 −1.68 to −1.00 0.38 0.30 to 0.48 0.42 0.33 to 0.54 0.52 0.43 to 0.62 0.49 0.40 to 0.60
Both ≥2 weeks −1.65 −2.69 to −0.61 0.34 0.17 to 0.68 0.36 0.17 to 0.74 0.38 0.22 to 0.65 0.52 0.29 to 0.92
Distance to health facility <2.5 km as baseline
2.5–4.99 km 0.15 −0.24 to 0.54 1.38 1.03 to 1.86 1.42 1.05 to 1.92 1.22 0.97 to 1.53 1.23 0.95 to 1.60 Different
5–7.49 km 0.22 −0.15 to 0.59 1.37 1.02 to 1.86 1.54 1.14 to 2.10 1.17 0.93 to 1.48 1.26 0.97 to 1.64 Different
>7.5 km 0.18 −0.20 to 0.56 1.26 0.91 to 1.74 1.38 1.00 to 1.93 1.11 0.86 to 1.42 1.16 0.87 to 1.53 Same
Religion Non-Catholic Christian as baseline
Catholic −0.11 −0.35 to 0.12 0.96 0.81 to 1.13 1.11 0.94 to 1.31 1.00 0.88 to 1.14 0.97 0.84 to 1.12 Same
Muslim −0.05 −1.11 to 1.01 0.77 0.38 to 1.54 0.58 0.29 to 1.17 0.75 0.43 to 1.30 0.66 0.36 to 1.23
Other 0.09 −0.81 to 0.99 1.02 0.53 to 1.93 0.79 0.41 to 1.49 0.92 0.59 to 1.45 0.89 0.53 to 1.51
Tribe Chewa as baseline
Ngoni −0.56 −1.01 to −0.11 0.70 0.51 to 0.95 0.72 0.53 to 0.99 0.86 0.68 to 1.09 0.73 0.56 to 0.96
Senga 1.16 0.64 to 1.68 0.97 0.57 to 1.64 1.01 0.60 to 1.71 1.07 0.72 to 1.60 1.05 0.66 to 1.68
Yao 0.17 −0.89 to 1.23 1.17 0.58 to 2.33 1.19 0.6 to 2.38 1.17 0.68 to 2.01 1.26 0.69 to 2.31
Other 0.10 −0.80 to 1.00 1.12 0.61 to 2.07 0.94 0.52 to 1.69 0.91 0.57 to 1.45 0.94 0.56 to 1.59 Same

Note: Figures in bold denote significance (P<0.05).

Abbreviations: LMUP, London Measure of Unplanned Pregnancy; OR, odds ratio; CI, confidence interval.