Table 9.

Multivariable associations between individual- and village-level factors and the cumulative incidence of SC among 2,211 individuals providing both serum at baseline and pre-randomization 18-month follow-up visits in 60 villages of Burkina Faso

		CIR (95% CI)
Variable		Model 1	Model 2
Province	Boulkiemde	2.19 (1.08; 4.45)*	2.41 (1.21; 4.78)*
	Nayala	1.81 (0.76; 4.29)	3.28 (1.37; 7.84)†
	Sanguie	Ref	Ref
Age (years)	6–17	Ref	Ref
	18–30	1.73 (0.82; 3.63)	1.70 (0.81; 3.56)
	31–40	1.09 (0.46; 2.55)	1.12 (0.48; 2.63)
	> 40	1.71 (0.91; 3.20)‡	1.70 (0.91; 3.18)‡
Gender	Male	0.97 (0.58; 1.61)	0.99 (0.60; 1.64)
	Female	Ref	Ref
Change eating pork	Change, improved	0.57 (0.23; 1.44)	0.59 (0.24; 1.47)
	Change, deteriorated	1.08 (0.34; 3.41)	1.10 (0.35; 3.42)
	No change, kept good	0.42 (0.21; 0.81)*	0.55 (0.28; 1.07)‡
	No change, kept bad	Ref	Ref
Percentage household owning pigs	Per unit increase	–	1.03 (1.01; 1.05)†

CIR = cumulative incidence ratio; Ref = reference; SC = seroconversion; 95% CI = 95% Wald confidence interval for fixed effects in mixed models with village as random effect, and type of concession, the sampling interval, and the variables of interest as fixed effect. All models also included province, age, and gender as fixed effects.

Model 1: without village-level variables; Model 2: with village-level variables.

^*P < 0.05.

^†P < 0.01.

^‡P < 0.10.