Table 3. Hierarchical model to identify factors associated with number of iron-folic acid supplement during their pregnancy period among pregnant and postnatal mothers attending ANC and PNC follow up in governmental health centers in Akaki Kality sub city, 2015.

	Model 1 ARR, 95%CI	Model 2 ARR, 95%CI	Model 3(Final) ARR,95%CI
Mothers education(Ref = cannot read and write)
Can read and write	1.3(0.92,1.81)	1.32(0.99,1.74)	1.25(0.94,1.66)
Primary education	1.21(0.89,1.62)	1.17(0.91,1.48)	1.10(0.84,1.41)
Secondary education	1.45(1.04,1.97)*	1.42(1.09,1.82)*	1.34(1.01,1.75)*
College and above	1.33(0.91,1.93)	1.32(0.97,1.78)	1.22(0.88,1.67)
Mother's occupation (Ref = Housewife)
Government employ	0.98(0.78,1.24)	0.96(0.79,1.18)	0.91(0.75,1.12)
Private employ	1.25(1.05,1.49)*	1.28(1.10,1.49)*	1.28(1.11,1.49)***
Merchant	0.97(0.77,1.22)	0.99(0.82,1.20)	0.95(0.79,1.12)
Farmer	0.63(0.36,1.21)	0.65(0.40,1.11)	0.63(0.39,1.07)
Family Income(ref = 900–1800)
1801–2700 ETB	0.9(0.72,1.13)	0.82(0.67,1.00)	0.82(0.68,1.00)
2701–3600	0.87(0.68,1.11)	0.74(0.60,0.91)*	0.74(0.60,0.91)**
3601–4500	0.73(0.54,1.00)*	0.68(0.52,0.89)*	0.68(0.53,0.88)**
>4500	0.97(0.73,1.27)	0.82(0.65,1.03)	0.80(0.64,1.01)
Encounter any side effect(Yes)		0.80(0.72,0.89)*	0.81(0.73,0.90)***
Received health education		1.19(1.05,1.34)*	1.17(1.03,1.32)*
The supplement increases blood(Yes)			1.16(1.04,1.31)**
Supplement is taken when sick(Yes)			0.55(0.37,0.87)**

Signif. Codes:0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05

(Dispersion parameter for Negative Binomial (3.0911) family taken to be 1)

Null deviance: 648.82 on 517 degrees of freedom

Residual deviance: 569.57 on 499 degrees of freedom

AIC: 4841.8