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Table 2 Univariate associations between factors investigated for prevalence of Plasmodium infection by uPCR

From: Submicroscopic Plasmodium prevalence in relation to malaria incidence in 20 villages in western Cambodia

Variable Number uPCR positive for Plasmodium uPCR negative for Plasmodium p value* Odds ratioa Adjusted odds ratiob
Number (%) Number (%) (95% CI) (95% CI)
Number 1000 91 (9) 909 (91)    
Gender     <0.0001 3.3
(2.0–5.4)
2.0
(1.2–3.4)
 Male 468 66 (14) 402 (86)    
 Female 532 25 (5) 507 (95)    
Age groups (years)     0.018 1.6
(1.1–2.6)
2.1
(1.3–3.4)
 18–30 443 51 (11.5) 392 (88.5)    
 >30 557 40 (7.2)  517 (92.8)     
Tympanic temperature (°C)     0.365 0.7
(0.3–1.5)
0.9
(0.4–1.9)
≤37.5 883 83 (9) 800 (91)    
≥37.5 117 8 (7) 109 (93)    
Self-reported fever in previous 48 h     0.255 0.6
(0.2–1.5)
0.7
(0.3–1.8)
 Fever 87 5 (6) 82 (94)    
 No fever 913 86 (9) 827 (91)    
Self-reported illness in the previous 48 h     0.121 0.7
(0.5–1.1)
0.9
(0.6–1.5)
 Illness 506 39 (8) 467 (92)    
 No illness 494 52 (11) 442 (89)    
Self-reported history of ever having had malaria in past     <0.0001 5.3
(2.6–10.9)
5.1
(2.5–10.7)
 Yes 654 82 (13) 572 (87)    
 No 346 9 (3) 337 (97)    
Forest visit in the previous 3 months     <0.0001 4.1
(2.5–6.5)
2.7
(1.6–4.8)
 Yes 156 35 (22) 121 (78)    
 No 844 56 (7) 788 (93)    
Travel in the previous 3 months     0.489 1.2
(0.7–1.9)
1.1
(0.7–1.8)
 Yes 245 25 (10) 220 (90)    
 No 755 66 (9) 689 (91)    
Bed net use     0.004 0.5
(0.3–0.8)
0.8
(0.5–1.5)
 Everyday 849 68 (8) 781 (92)    
 Sometimes or never 151 23 (15) 128 (85)    
  1. * Pearson Chi Square test
  2. aMantel Haenszel odds
  3. bLogistic regression, adjustment for gender, age group, temperature ≤ 37.5 °C