Table 1. Characteristics of study population.

	Brucellosis cases	Control group A	P Value
n	470	1410	-
% Male	62.6%	62.6%	1.000 a
% Bedouins	84.9%	81.9%	.140 a
Age b	26.62 ± 17.64 (21, 1–85)	26.64 ± 17.66 (21, 1–86)	0.991ᶜ
SES b , d	1.01 ± 0.09 (1, 1–2)	1.01 ± 0.09 (1, 1–2)	1.000ᶜ
CCI b	0.41 ± 1.12 (0, 0–7)	0.45 ± 1.15 (0, 0–9)	0.391ᶜ

Abbreviations: SES- Socioeconomic status; CCI- Charlson comorbidity index.

^a Chi-square test.

^b Values are mean ± SD (median, min-max).

^c Mann-Whitney U test.

^d SES was defined as: low (1), average (2), high (3) according to the enrollee's community clinic.