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Table 3 Poisson regression analyses of average annual percent change in research production by Africa subregions.

From: Geography of Africa biomedical publications: An analysis of 1996–2005 PubMed papers

  Model 1 (1996 – 2005) Model 2 (1996 – 2000) Model 3 (2001 – 2006)
  β (SE) AAPC P-value β (SE) AAPC P-value β (SE) AAPC P-value
Eastern Africa 0.05 (0.004) 4.6 <0.001 -0.10 (0.013) -0.9 0.474 0.04 (0.011) 3.9 0.001
Middle Africa 0.14 (0.110) 14.8 <0.001 0.13 (0.037) 13.6 0.001 0.15 (0.027) 15.8 <0.001
Northern Africa 0.12 (0.004) 12.8 <0.001 0.12 (0.013) 12.3 <0.001 0.10 (0.010) 10.7 <0.001
Southern Africa 0.06 (0.003) 6.5 <0.001 0.08 (0.010) 7.8 <0.001 0.06 (0.009) 6.2 <0.001
Western Africa 0.10 (0.004) 10.1 <0.001 0.14 (0.012) 15.3 <0.001 0.08 (0.010) 8.8 <0.001
All 0.08 (0.002) 8.7 <0.001 0.08 (0.006) 8.7 <0.001 0.08 (0.005) 7.9 <0.001
  1. β indicates regression coefficient (trend); SE standard error of β, AAPC average annual percentage change