Table 2 Demographic and clinical characteristics of individuals selected for analysis of P. falciparum subpatent infections from cross-sectional health facility surveys (in10 regions) and community surveys (in four regions) in Mainland Tanzania
Variable | HF Survey | CSSa | ||
|---|---|---|---|---|
Total analysed | Pf Subpatent infections | Total analysed | With Pf Subpatent infections | |
Total | 1,543 | 287 (18.6) | 568 | 97 (17.1) |
Age groupb | Â | Â | Â | Â |
  < 5 years | 560 (36.3) | 133 (23.8) | 79 (13.9) | 8 (7.9) |
 5–15 years | 196 (12.7) | 39 (19.9) | 142 (25.0) | 19 (15.1) |
 15 + years | 787 (51.0) | 115 (14.6) | 347 (61.1) | 70 (20.5) |
p-value | 1 |  < 0.001 |  | 0.002 |
Sexc | Â | Â | Â | Â |
 Female | 841 (56.7) | 136 (16.2) | 410 (72.8) | 72 (17.5) |
 Male | 642 (43.3) | 103 (16.0) | 153 (27.2) | 22 (14.4) |
p-value | Â | 0.947 | Â | 0.86 |
Fever history (past 48Â h)d | Â | Â | Â | Â |
 No | 132 (9.0) | 26 (19.7) | 344 (61.1) | 53 (15.4) |
 Yes | 1342 (91.0) | 211 (15.7) | 219 (38.9) | 41 (18.7) |
p-value | Â | 0.236 | Â | 0.332 |
Fever at presentation (a. temp. ≥ 37.5 °C)d |  |  |  |  |
 No | 825 (56.0) | 129 (15.6) | 550 (96.8) | 94 (17.1) |
 Yes | 649 (44.0) | 108 (16.6) | 18 (3.2) | 0 (0.00) |
p-value | Â | 0.602 | Â | 0.84 |
Transmission strata | Â | Â | Â | Â |
 High | 220 (14.3) | 52 (23.6) | 367 (64.6) | 57 (15.5) |
 Moderate | 160 (10.4) | 41 (25.6) | 201 (35.4) | 48 (23.9) |
 Low | 262 (17.0) | 77 (29.4) | NA | NA |
 Very low | 901 (58.4) | 117 (13.0) | NA | NA |
p-value |  |  < 0.001 |  | 0.014 |
Regions | Â | Â | Â | Â |
 Dar es Salaam | 62 (4.0) | 16 (25.8) |  |  |
 Dodoma | 149 (10.0) | 58 (38.9) |  |  |
 Kagera | 159 (10.3) | 35 (22.0) |  |  |
 Kilimanjaro | 736 (47.7) | 94 (12.8) |  |  |
 Manyara | 81 (5.2) | 9 (11.1) |  |  |
 Mara | 101 (6.5 | 24 (23.8) |  |  |
 Mtwara | 61 (4.0) | 17 (27.9) |  |  |
 Njombe | 84 (5.4) | 14 (16.7) |  |  |
 Songwe | 51 (3.3) | 3 (5.9) |  |  |
 Tabora | 59 (3.8) | 17 (28.8) |  |  |
 Kigoma |  |  | 207 (36.4) | 18 (8.7) |
 Ruvuma |  |  | 160 (28.2) | 39 (24.4) |
 Tanga |  |  | 201 (35.4) | 48 (23.9) |
 Geitae |  |  | 574 (21.4) | 141 (24.6) |
p-value |  |  < 0.001 |  |  < 0.001 |