Quasi-Poisson versus negative binomial regression models in identifying factors affecting initial CD4 cell count change due to antiretroviral therapy administered to HIV-positive adults in North–West Ethiopia (Amhara region)

Seyoum, Awoke; Ndlovu, Principal; Zewotir, Temesgen

doi:10.1186/s12981-016-0119-6

Table 3 Parameter estimates using Quasi-Poisson model

From: Quasi-Poisson versus negative binomial regression models in identifying factors affecting initial CD4 cell count change due to antiretroviral therapy administered to HIV-positive adults in North–West Ethiopia (Amhara region)

Coefficients	Coefficients	Exp (coefficients)	Std. error	t value	Pr (>\|t\|)
(Intercept)	1.3620765	3.9012	0.21603	6.305	4.84e⁻¹⁰***
Age	−0.0121754	0.988	0.00171	−7.126	2.38e⁻¹²***
Weight	0.0213740	1.0216	0.00277	7.706	3.98e⁻¹⁴***
Initial.CD4	0.0034295	1.0212	0.00042	8.143	1.54e⁻¹⁵***
Gender (ref = female)
Gender male	−0.0144168	0.9856	0.02292	−0.629	0.5296
Residence (rural)
Urban	0.0412981	1.0422	0.02309	1.789	0.0740
Education (ref. = no edu.)
Educ. primary	0.0191098	1.0192	0.04796	0.398	0.6904
Educ. secondary	0.0280730	1.02847	0.04215	0.666	0.5056
Educ. tertiary	0.0627961	1.0648	0.04688	1.340	0.1808
Marital status (ref = without part)
With part	0.0939004	1.09845	0.03196	2.938	0.0034**
Household income (ref = high)
Low income	−0.4627385	0.62955	0.06061	−7.634	6.71e⁻¹⁴***
Middle income	−0.3010270	0.74322	0.04312	−6.982	6.29e⁻¹²***
Owner of cell phone (ref = with cell phone)
Without phone	−0.4021422	0.66888	0.04867	−8.263	6.15e⁻¹⁶***
Adherence (ref = good)
Adherence fair	−0.5250367	0.5921	0.0596023	−2.517	0.0120*
Adherence poor	−0.6800367	0.50621	0.0596023	−1.267	<2e⁻¹⁶***
Level of exposedness (ref = exposed)
Not exposed	−0.0968024	0.9077	0.0423628	−2.285	0.0226*
WHO stages (ref = stage 1)
WHO. Stage stage 2	−0.1039865	0.90521	0.0389829	−2.667	0.0078**
WHO. Stage stage 3	−0.0949728	0.90981	0.0500913	−1.896	0.0058*
WHO. Stage stage 4	−0.1321290	0.87623	0.0572926	−2.306	0.0214*
Marital status* adherence (ref = good adherence and living with partner)
Living with partner* poor adherence	−2.316	0.09912	0.7866	−0.261	0.461*
Living without partner* fair adherence	−2.415	0.08923	0.7827	−0.234	0.002*
Owner of cell phone* age (ref = with cell phone)
With cell phone* age	−0.013	0.98721	0.0050	−2.598	0.007*
Marital status* initial CD4 cell count (ref = without partner)
Living with partner* CD4	0.007	1.007	0.0010	2.651	0.000*

Signif. Codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘’ 1

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ISSN: 1742-6405

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