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Table 5 Population-based HIV prevalence trends of groups with high mobility index by sex in selected areas in Zambia, 1995–2003

From: Steep HIV prevalence declines among young people in selected Zambian communities: population-based observations (1995–2003)

Sex Residence Year HIV prevalence (n) Age-adjusted Odds Ratio (OR)ψ for likelihood of HIV infection in 1999 and 2003 (Reference, 1995) χ2 for linear trend (P value)
Males Rural 1995 19.1(94) 1.00 0.255
   1999 12.6(87) 0.59(0.26–1.33)  
   2003 16.3(104) 0.72(0.34–1.54)  
  Urban 1995 23.0(226) 1.00 0.036
   1999 23.4(107) 0.98(0.56–1.75)  
   2003 14.7(197) 0.52(0.31–0.88)  
Females Rural 1995 20.0(65) 1.00 0.289
   1999 15.9(107) 0.74(0.33–1.66)  
   2003 16.4(128) 0.77(0.35–1.67)  
  Urban 1995 35.0(314) 1.00 0.009
   1999 28.1(139) 0.75(0.48–1.18)  
   2003 25.0(252) 0.63(0.43–0.92)  
  1. Notes 1. High mobility index was a composite measure of groups who travelled out of station frequently for any reason and have lived at current residence for less or equal to two years. 2. ORψ was adjusted for age and school years (as a continuous variable), employment status and marital status. Statistically significant OR highlighted in bold 3. Extended Mantel-Haenszel Chi square for linear trend, (1 degree of freedom) with continuity correction was used; highlighted in bold is statistically significant P value 4. Sample sizes were n = 585 in rural and 1235 in urban (age group 15–49 years).