Skip to main content

Table 1 Number of articles indexed by PubMed from top 20 countries, percentage of Africa publication, relative growth, and Poisson regression analysis of annual percent change: 1996 – 2005

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

  Number of articles (% within a calendar year) Relative growth Poisson regression trend analysis
  1996 – 2005 1996 2005 (%) β (SE) AAPC P – value
South Africa 11218 (29.9) 829 (34.0) 1536 (28.4) 85.3 0.06 (0.003) 6.3 < 0.001
Egypt 6557 (17.5) 414 (17.0) 956 (17.7) 130.9 0.01 (0.004) 10.4 < 0.001
Nigeria 4795 (12.8) 38 (1.6) 834 (15.4) 2094.7 0.15 (0.005) 16.3 < 0.001
Kenya 1887 (5.0) 189 (7.7) 246 (4.6) 30.2 0.05 (0.008) 5.5 < 0.001
Tunisia 1027 (2.7) 27 (1.1) 267 (4.9) 888.9 0.27 (0.013) 31.7 < 0.001
Zimbabwe 945 (2.5) 123 (5.0) 58 (1.1) -52.8 -0.09 (0.012) -8.5 < 0.001
Senegal 875 (2.3) 65 (2.7) 117 (2.2) 80.0 0.04 (0.012) 3.6 0.003
Morocco 863 (2.3) 33 (1.4) 141 (2.6) 327.3 0.14 (0.013) 15.5 < 0.001
Ethiopia 860 (2.3) 79 (3.2) 116 (2.1) 46.8 0.08 (0.013) 8.1 < 0.001
Tanzania 761 (2.0) 71 (2.9) 107 (2.0) 188.4 0.06 (0.013) 6.4 <0.001
Uganda 761 (2.0) 43 (1.8) 124 (2.3) 50.7 0.11 (0.013) 11.6 <0.001
Ghana 691 (1.8) 50 (2.1) 94 (1.7) 88.0 0.06 (0.013) 5.9 <0.001
Ivory coast 516 (1.4) 24 (1.0) 55 (1.0) 129.2 0.04 (0.015) 4.7 0.003
Cameroon 512 (1.4) 24 (1.0) 83 (1.5) 245.8 0.14 (0.016) 15.2 <0.001
Malawi 450 (1.2) 34 (1.4) 57 (1.1) 67.6 0.09 (0.017) 9.2 <0.001
Sudan 442 (1.2) 34 (1.4) 68 (1.3) 100.0 0.08 (0.017) 9.9 <0.001
Guinea 428 (1.1) 65 (2.7) 33 (0.6) -49.2 -0.03 (0.017) -3.3 0.044
Burkina Faso 365 (1.0) 22 (0.9) 39 (0.7) 77.3 0.05 (0.018) 4.9 0.009
Eritrea 337 (0.9) 34 (1.4) 54 (1.0) 58.8 0.15 (0.020) 16.6 <0.001
The Gambia 335 (0.9) 31 (1.3) 33 (0.6) 6.5 0.01 (0.019) 0.8 0.669
  1. β indicates regression coefficient (trend); SE standard error of β, AAPC average annual percentage change