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Table 4 Frequency of various malaria risk factors and strength of association with Plasmodium falciparum parasitaemia

From: Choosing interventions to eliminate forest malaria: preliminary results of two operational research studies inside Cambodian forests

Variable Value N (%) N Pf+ (%) Odds ratio p-value
Observation-intervention study
 Age 18–49 1316 (82%) 60 (82%) Ref Ref
< 18 160 (10%) 9 (12%) 1.15 (0.52, 2.25) 0.70
50+ 136 (8%) 4 (5%) 0.67 (0.2, 1.66) 0.44
 Gender Male 1480 (92%) 71 (97%) Ref Ref
Female 132 (8%) 2 (3%) 0.3 (0.05, 0.98) 0.10
 Logging No 890 (55%) 31 (42%) Ref Ref
Yes 722 (45%) 42 (58%) 1.68 (1.05, 2.72) 0.03
 Fever last month No 998 (62%) 35 (48%) Ref Ref
Yes 614 (38%) 38 (52%) 1.76 (1.10, 2.83) 0.02
 Usually stay overnight No 351 (22%) 16 (22%) Ref Ref
Yes 1261 (78%) 57 (78%) 1.02 (0.59, 1.86) 0.95
 Treated for malaria before Never 225 (14%) 8 (11%) Ref Ref
< 1 month ago 292 (18%) 13 (18%) 1.17 (0.48, 3.01) 0.73
< 1 year ago 402 (25%) 23 (32%) 1.52 (0.69, 3.67) 0.32
> 1 year ago 311 (19%) 11 (15%) 0.94 (0.37, 2.47) 0.89
Never heard of malaria 382 (24%) 18 (25%) 1.33 (0.58, 3.30) 0.51
MSAT Study
 Age 18–49 1372 (85%) 32 (86%) Ref Ref
< 18 117 (7%) 1 (3%) 0.36 (0.02, 1.72) 0.32
50+ 122 (8%) 4 (11%) 1.41 (0.41, 3.62) 0.53
 Gender Male 1424 (88%) 32 (86%) Ref Ref
Female 188 (12%) 5 (14%) 1.20 (0.41, 2.86) 0.71
 Logging No 1328 (82%) 29 (78%) Ref Ref
Yes 284 (18%) 8 (22%) 1.29 (0.54,2.72) 0.53
 Fever last month No 1118 (69%) 26 (70%) Ref Ref
Yes 494 (31%) 11 (30%) 0.96 (0.45, 1.90) 0.90
 Usually Stay Overnight No 111 (7%) 4 (11%) Ref Ref
Yes 1501 (93%) 33 (89%) 0.59 (0.23,2.02) 0.34
 Treated for malaria before Never 327 (20%) 8 (22%) Ref Ref
< 1 month ago 96 (6%) 2 (5%) 0.88 (0.13, 3.60) 0.88
< 1 year ago 147 (9%) 4 (11%) 1.12 (0.29,3.62) 0.86
> 1 year ago 913 (57%) 21 (57%) 0.95 (0.43, 2.28) 0.89
Never heard of malaria 129 (8%) 2 (5%) 0.64 (0.10, 2.60) 0.58