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Table 2 Analysis of risk factors using PCR as dependent variable

From: Isolation of Mycobacterium avium and other nontuberculous mycobacteria in chickens and captive birds in peninsular Malaysia

Factor Categories Prevalence (%) P-value OR 95%Cl
Location F4* 1/11 (9)   1.0 Ref
F13# 2/11 (18.2) 0.5 0.450 0.035–5.843
F14# 2/12 (20) 0.5 0.5 0.039–6.43 s
F15# 1/21 (4.7) 0.5 2.0 0.113–35.41
No of birds < 50 5/67   1.0 Ref
> 500 1/141 0.01a 11.47 1.313–100.3
Type of the birds Village chicken 1/57   1.0 Ref
Layer chicken 0/100 NA
Captive pet birds 5/85 0.22 .28 0.03–2.512
Breed of birds Local chicken 1/157    Ref
Exotic captive birds 5/85 0.02a 0.103 0.012–0.893
Feed Commercial 2/168    Ref
Local 4/74 0.07 0.21 0.038–1.178
Source of water Open surface tank 4/80    Ref
Drinkers 2/162 0.09 4.21 0.75–23.495
Hygiene Good 3/131    Ref
Fair 3/71 0.35 0.531 0.104–2.704
Poor 0/40    
Access of wild birds Yes 5/122    Ref
No 1/120 0.1 5.08 0.585–44.191
  1. * Village chicken; # exotic captive birds; a significant difference; Ref reference category, NA not applicable, OR Odd ratio, Cl Confidence interval. Facilities F1–3, F5–12 and F16–19 were not included in the analysis as there was zero prevalence in the facilities