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Table 3 Factors associated with new HIV diagnoses in non-spatial and spatial models, Siaya County

From: Mapping geographic clusters of new HIV diagnoses to inform granular-level interventions for HIV epidemic control in western Kenya

  Unadjusted relative risk (uRR) Adjusted relative risk (aRR)
Fixed effects only Spatially unstructured model Spatially structured model Convolution spatially unstructured and structured model
uRR (95% CI) aRR (95% CI) aRR (95% CI) aRR (95% CI) aRR (95% CI)
Age groups (years)
 15–19 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref)
 20–24 4.44 (3.73–5.33) 3.55 (2.94–4.31) 3.46 (2.86–4.2) 3.45 (2.85–4.19) 3.45 (2.85–4.2)
 25–35 8.03 (6.84–9.48) 4.78 (3.94–5.83) 4.78 (3.93–5.82) 4.76 (3.92–5.81) 4.76 (3.92–5.81)
  > 35 5.05 (4.3–5.96) 2.44 (1.99–3) 2.45 (2–3.01) 2.44 (1.99–3) 2.44 (1.99–3)
Sex
 Women 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref)
 Men 0.85 (0.79–0.92) 0.95 (0.88–1.03) 0.96 (0.89–1.04) 0.96 (0.89–1.04) 0.96 (0.89–1.04)
Marital status
 Married monogamous 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref)
 Married polygamous 1.74 (1.47–2.04) 1.86 (1.57–2.19) 1.84 (1.55–2.17) 1.84 (1.55–2.17) 1.84 (1.55–2.16)
 Separated/divorced 3.71 (3.01–4.51) 3.35 (2.72–4.08) 3.37 (2.73–4.1) 3.36 (2.72–4.08) 3.36 (2.72–4.08)
 Single 0.3 (0.27–0.34) 0.49 (0.42–0.55) 0.5 (0.44–0.57) 0.5 (0.44–0.57) 0.5 (0.44–0.57)
 Widow/widower 0.98 (0.87–1.1) 1.13 (0.99–1.28) 1.1 (0.97–1.24) 1.1 (0.97–1.24) 1.1 (0.97–1.24)
Time since last HIV test
  < 3 months 1.36 (0.94–1.9) 1.31 (0.9–1.81) 1.31 (0.9–1.83) 1.33 (0.91–1.85) 1.33 (0.91–1.85)
 3–12 months 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref) 1.00 (ref)
  > 12 months 1.58 (1.46–1.71) 1.51 (1.39–1.63) 1.54 (1.41–1.67) 1.53 (1.41–1.66) 1.53 (1.41–1.66)
Never tested 1.3 (1.12–1.5) 2.37 (2.04–2.74) 2.35 (2.02–2.73) 2.35 (2.01–2.72) 2.35 (2.02–2.72)
 Sub-location proportion of total HIV-positive clientsa 1.61 (1.43–1.8) 1.5 (1.34–1.68) 1.49 (1.21–1.82) 1.26 (1.04–1.53) 1.3 (1.07–1.6)
Random effects
 Spatially unstructured precision   6.01 (4.37–8.27)   17.39 (9.01–36.14)
 Spatially structured precision    2.44 (1.67–3.59) 4.97 (2.5–9.24)
Model comparison
 Effective number of parameters 13 125.12 109.09 113.8
 Deviation information criterion 11,153.63 10,816.12 10,811.64 10,810.58
  1. aThe proportion of total HIV-positive clients was defined as the sum of the total new HIV-positive and previously identified HIV-infected clients among those whose eligibility for HIV testing was assessed
  2. Abbreviations: uRR, unadjusted relative risk; aRR, adjusted relative risk; CI, credible interval