. 2018 Jan 24;12(1):e0006193. doi: 10.1371/journal.pntd.0006193

Table 1. Factors associated with indirect hemagglutination assay (IHA) results in 96 healthy rice farmers.

Organisms cultured from rice fields	IHA results		Odds Ratios (95% confidence interval)^*
Organisms cultured from rice fields	IHA positive ^** (n = 27 famers)	IHA negative ^** (n = 69 farmers)	Univariable analysis	Multivariable analysis
B. pseudomallei	21/27 (78%)	27/69 (39%)	3.39 (1.66–6.90), p = 0.001	3.72 (1.76–7.84), p = 0.001
B. thailandensis	12/27 (44%)	36/69 (52%)	0.92 (0.44–1.91), p = 0.82	0.63 (0.25–1.57), p = 0.32
BTCV	4/27 (15%)	17/69 (25%)	1.04 (0.60–1.80), p = 0.89	1.62 (0.63–4.17), p = 0.32

* Estimated by ordered logistic regression models stratified by sampled rice field.

** IHA titers ≥ 1:80 is defined as positive; IHA titers <1:80 is defined as negative.