Table 2.

SARS-CoV-2 seroprevalence rates, odds ratios, and 95% CI according to sociodemographic characteristics plus adjusted odds ratio (logistic model)

	N	Univariate	OR	P-value	Multivariate	P-value
		Prevalence [95% CI]			aOR (95% CI)
Gender
Female	151	25.2% [18.2–32.1%]	1.01 [0.94–1.09]		0.88 [0.58–1.3]	NS
Male	1,536	25% [22.8–27.2%]	0.99 [0.92–1.07]	NS	1
Age (years)
≤ 35	805	24.8% [21.9–27.8%]	0.98 [0.96–1.01]		1
36–49	733	25.2% [22.1–28.4%]	1.02 [1–1.05]		1.04 [0.82–1.33]	NS
≥ 50	149	24.8% [17.9–31.8%]	0.99 [0.92–1.07]	NS	1.18 [0.75–1.82]	NS
Employees status
Direct employees	848	33.3% [30.1–36.4%]	2.49 [2.4–2.56]		2.33 [1.8–3.1]	0.001
Subcontractors	721	13.7% [11.2–16.2%]	0.32 [0.3–0.33]	< 0.001	1
Administrative staff	118	34.7% [26.2–43.3%]	1.66 [1.53–1.8]		1.58 [0.34–6.8]	NS
Country of origin
Ivory Coast	1,458	26.5% [24.3–28.8%]	2 [1.86–2.15]		3.5 [1.9–7]	0.001
African other	143	16.1% [10.1–22.1%]	0.55 [0.5–0.6]	0.001	1.8 [0.9–4.2]	NS
Non-African	86	14% [6.6–21.3%]	0.47 [0.4–0.57]		1
Location
Mine A	803	34.4% [31.1–37.7%]	2.65 [2.58–2.72]		2.54 [1.9–3.35]	< 0.001
Mine B	763	13.6% [11.2–16.1%]	0.3 [0.3–0.3]	< 0.001	1
Abidjan	121	34.7% [26.2–43.2%]	1.66 [1.53–1.8]		3.5 [0.8–16.4]	NS

OR = odds ratio.