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Table 2 Univariate and multivariate analysis for risk factors of acquiring skin abscesses

From: Methicillin-susceptible Staphylococcus aureus skin infections among military conscripts undergoing basic training in Bangkok, Thailand, in 2014

Risk factors Total (%) Case (%) P value Crude OR (95 % CI) P value Adjusted OR (95 % CI)
Age (mean ± SD) 21.2 (±1.0) 21.0 (±1.0) 0.033 0.5 (0.3–0.9) 0.036 0.5 (0.3–1.0)
Education
 Bachelor 8 (4) 3 (37.5)   1   
 High vocational certificate 14 (7) 4 (28.6) 0.666 0.7 (0.1–4.2)   
 Vocational certificate 22 (10.9) 5 (22.7) 0.423 0.5 (0.1–2.8)   
 High school 106 (52.7) 19 (17.9) 0.191 0.4 (0.1–1.7)   
 Secondary school 51 (25.4) 7 (13.7) 0.112 0.3 (0.1–1.4)   
Subunit
 1 54 (25.4) 20 (37) 0.001 30.6 (3.9–238.6) 0.001 32.6 (4.1–260.6)
 2 51 (23.9) 16 (31.4) 0.003 23.8 (3.0–187.5) 0.002 26.9 (3.3–218.2)
 3 55 (25.8) 4 (7.3) 0.216 4.1 (0.4–37.7) 0.178 4.6 (0.5–44.1)
 4 53 (24.9) 1 (1.9)   1   
BMI (kg/m​2)
 Underweight <18.5 27 (12.7) 7 (25.9) 0.275 1.7 (0.6–4.6)   
 Normal range (18.5–22.9) 119 (55.9) 20 (16.8)   1   
 At risk of obesity (23–24.9) 29 (13.6) 5 (17.2) 0.955 1.0 (0.4–3.0)   
 Obese I (25–29.9) 29 (13.6) 7 (24.1) 0.362 1.6 (0.6–4.2)   
 Obese II (≥30) 9 (4.2) 2 (22.2) 0.679 1.4 (0.3–7.3)   
Multiple erythematous papules
 Yes 86 (39.0) 27 (31.4) <0.01 3.7 (1.8–7.6) <0.01 3.4 (1.5–7.5)
 No 127 (59.6) 14 (11)   1