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Table 3 Multivariable negative binomial regression modela for mean CD4-count enrolment into ClinSurv, 1999–2013 (n = 9080); significant results in bold

From: CD4-cell counts and presence of AIDS in HIV-positive patients entering specialized care—a comparison of migrant groups in the German ClinSurv HIV Cohort Study, 1999–2013

Mean CD4-count (cells/μl) at enrolment Ratio of mean CD4-count (IRR) 95%-CI p-value
Region of origin of migrant group
 Non-migrants Ref. -- --
 WE 0.94 0.75–1.16 0.551
 CE 0.97 0.83–1.14 0.733
 EE 0.84 0.68–1.03 0.092
SSA 0.72 0.64–0.82 <0.001
SEA 0.62 0.49–0.78 <0.001
Age Group (in years)
15–24 1.37 1.28–1.46 <0.001
25–34 1.12 1.08–1.17 <0.001
 35–44 Ref. -- --
45–54 0.88 0.83–0.92 <0.001
55+ 0.78 0.73–0.84 <0.001
Sex
 Male Ref. --  
Female 1.07 1.02–1.13 0.007
Time trend (per year) by region of origin, 1999–2013
Non-migrants 1.01 1,01–1.02 <0.001
 WE 1.01 0.98–1.03 0.509
 CE 1.03 1.01–1.05 0.008
 EE 0.97 0.94–1.00 0.065
 SSA 1.01 1.00–1.02 0.139
 SEA 1.01 0.99–1.04 0.367
Mean CD4-count (cells/ul) at enrolment Incidence rate 95%-CI p -value
(reference group) 2013 383 365–403 <0.001
  1. aDispersion parameter: Alpha = 0.76 (95%-CI: 0.73–0.78)