Table 3.

Multilevel logistic regression on the association between adolescent childbirth and under-five morbidity in sub-Saharan Africa

Variables	Model 0	Model I cOR (95 % CI)	Model II aOR (95 % CI)
Fixed effects
Age at first childbirth
< 20 years		1.16***[1.13–1.19]	1.10** (1.07–1.12)
≥ 20 years		Reference	Reference
Random effects
Primary sampling unit variance (95 % CI)	0.11 (0.09–0.15)	0.11 (0.08–0.14)	0.06 (0.05–0.08)
Intraclass correlation coefficient	0.03	0.03	0.02
Wald chi-square	Reference	170.27***	1430.54***
Model fitness
Log-likelihood	-189072.57	-188907.15	-137588.17
Akaike’s Information Criterion	378149.1	377820.3	275226.3
Sample size	311,603	311,603	311,603
Number of clusters	1610	1610	1610

NB: Model II adjusted for mother’s age, marital status, pregnancy intention, place of residence, mother’s education level, wealth quintile, sex of child, child’s weight, number of ANC visits, place of delivery, and assistant during delivery; cOR=crude odds ratio; aOR=adjusted odds ratio

^*p < 0.05; ^**p < 0.01; ^***p < 0.001