Table 2.

Negative binomial regression model (NBRM) used to assess seroprevalence as a function of time and space (*** = significant).

	Regression coefficient	Standard error	z-value	p-value
Block 0	−3.1101	0.5687	−5.4684	4.541e−08***
Block 1	−1.5425	0.4187	−3.6839	0.0002***
Block 2	0.3454	0.2825	1.2228	0.2214
Time	0.0029	0.0699	0.0410	0.9673
Block 1: time	−0.3193	0.1194	−2.6746	0.0075***
Block 2: time	−0.3183	0.0901	−3.5350	0.0004***