Table 2.

Poisson regression analysis of possible factors associated with Salmonella frequency

Variable	Crude ratios PR (95% CI)	Adjusted ratios PR (95% CI)
All Salmonella isolates
Commercial vs. smallholder farms	2.7 (1.7 – 4.4)	2.6 (1.6 – 4.3)
Ejisu (semi-urban) vs. Agogo (rural)	1.4 (0.9 – 2.2)	1.3 (0.8 – 2.0)
Dust vs. fecal	2.8 (1.4 – 5.6)	2.7 (1.4 – 5.5)
Dust vs. soil	1.3 (0.8 – 2.1)	1.4 (0.8 – 2.3)
Soil vs fecal	2.0 (1.1 – 3.9)	1.9 (1.1 – 3.6)
Soil Salmonella isolates
Poultry vs. Other livestock	0.5 (0.3 – 0.8)	0.5 (0.3 – 0.9)
≤ 5 m near pen vs. > 5 m away from pen	1.4 (0.8 – 2.4)	1.3 (0.6 – 2.4)