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Table 2 Distribution of malaria infection by study round (R), village, ecosystem and watershed

From: Spatio-temporal prevalence of malaria and anaemia in relation to agro-ecosystems in Mvomero district, Tanzania

Variable Negative N (%) Positive N (%) Total N (%) p-valuea
Survey rounds (R)
 R1 (August: dry and cool) 1321 (25.5) 767 (28.2) 2088 (26.5) < 0.001
 R2 (November: short rains) 1183 (22.9) 730 (26.9) 1913 (24.3)  
 R3 (February: dry and hot) 1405 (27.2) 508 (18.7) 1913 (24.3)  
 R4 (May: long rains) 1263 (24.4) 711 (26.2) 1974 (25.0)  
Village
 Komtonga 380 (7.4) 746 (27.5) 1126 (14.3) < 0.001
 Mkindo 672 (13) 470 (17.3) 1142 (14.5)  
 Mbogo 655 (12.7) 557 (20.5) 1212 (15.4)  
 Dihombo 789 (15.3) 206 (7.6) 995 (12.6)  
 Luhindo 776 (15) 349 (12.9) 1125 (14.3)  
 Dakawa 786 (15.2) 301 (11.1) 1087 (13.8)  
 Mtibwa 1114 (21.5) 87 (3.2) 1201 (15.2)  
Ecosystem
 Savannah 1575 (30.5) 507 (18.7) 2082 (26.4) < 0.001
 Rice-irrigation 2483 (48) 2122 (78.1) 4605 (58.4)  
 Sugarcane 1114 (21.5) 87 (3.2) 1201 (15.2)  
Water shed area
 High 1707 (33) 1773 (65.3) 3480 (44.1) <0.001
 Medium–Low 2351 (45.5) 856 (31.5) 3207 (40.7)  
 Dry 1114 (21.5) 87 (3.2) 1201 (15.2)  
Total 5172 (65.6) 2716 (34.4) 7888  
  1. ap-values estimated from Chi square test of association