Table 3.

Univariable and multivariable analysis

Variable		n	Seroprevalence	Univariate Odds Ratio	Multivariate Odds Ratio (95% CI)
Sex
Female		27858	3490 (12.5%)	1.00	1.00
Male		28301	3521 (12.4%)	0.99	1.01 (0.95; 1.07)
Age (years)
2-9		3899	447 (11.5%)	1.00	1.00
10-19		6196	889 (14.3%)	1.29	1.22 (1.07; 1.40)
20-29		6305	675 (10.7%)	0.93	0.92 (0.78; 1.08)
30-39		8587	899 (10.5%)	0.90	0.95 (0.80; 1.14)
40-49		10985	1287 (11.7%)	1.02	1.12 (0.95; 1.33)
50-59		9560	1396 (14.6%)	1.32	1.44 (1.22; 1.71)
60-69		5655	767 (13.6%)	1.21	1.42 (1.18; 1.70)
70-79		2776	381 (13.7%)	1.23	1.42 (1.17; 1.74)
80-89		1093	162 (14.8%)	1.34	1.65 (1.30; 2.11)
≥ 90		226	39 (17.3%)	1.61	1.56 (0.97; 2.50)
Symptoms
Symptoms first survey	no	58781	7261 (32.6%)	1.00	1.00
	yes	1667	338 (20.3%)	1.80	2.00 (1.72; 2.33)
Symptoms second survey	no	59253	7463 (12.59%)	1.00	1.00
	yes	836	140 (16.7%)	1.40	1.06 (0.84; 1.33)
Occupational status
Student	no	50918	6318 (12.4%)	1.00	1.00
	yes	11296	1507 (13.3%)	1.09	1.44 (0.64; 3.25)
Seasonal worker	no	61864	7715 (12.4%)	1.00	1.00
	yes	1681	288 (17.1%)	1.45	2.41 (1.07; 5.45)
Health care worker	no	60985	7670(12.5%)	1.00	1.00
	yes	1771	222 (12.5%)	1.0	1.33 (0.60; 2.95)
Parish
Andorra la Vella		18277	1699 (9.3%)	1.00	1.00
Canillo		3708	457 (12.3%)	1.37	1.16 (1.02; 1.33)
Encamp		9801	970 (9.9%)	1.07	1.09 (0.98; 1.21)
Escaldes-Engordany		11804	1527 (12.9%)	1.45	1.44 (1.32; 1.57)
La Massana		8108	1636 (20.2%)	2.47	2.66 (2.44; 2.89)
Ordino		3807	481 (12.6%)	1.41	1.47 (1.30; 1.67)
Sant Julià de Lòria		8021	1255 (15.6%)	1.81	1.82 (1.66; 2.00)