Table 3.

Prevalence of serum antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the general population based on subgroups according to different sociodemographic geographic parameters and time during, calculated using a random effects model

Parameters/subgroups	Number of datasets	Number of people screened (total)	Number of seropositive people	Pooled seroprevalence % (95%CI)
Income
Lower middle	1	3098	174	5.62 (4.83–6.49)
Upper middle	26	120 242	2361	1.31 (1.02–1.59)
High	80	275 925	13 344	4.44 (3.77–5.1)
Human development index
Medium	1	3 098	174	5.62 (4.83-6.49)
High	26	119 426	2358	1.35 (1.06–1.64)
Very high	80	276 741	13 347	4.37 (3.71–5.02)
Latitude
0–20°	5	18 007	496	2.99 (0.71–5.28)
20–40°	49	160 890	4034	2.29 (2.03–2.56)
40–60°	53	220 368	11 349	4.68 (3.92–5.43)
Longitude
0–30°	53	220 851	9969	4.15 (3.49–4.82)
30–60°	16	35 478	769	1.76 (1.18–2.34)
60–90°	10	27 927	2435	6.36 (3.07–9.66)
90–120°	18	102 378	2497	2.80 (2.37–3.22)
≥120	10	12 631	209	1.63 (1.01–2.25)
Relative humidity (%)
<60	15	62 692	3763	5.84 (3.81–7.87)
60–79	76	306 057	11 159	3.41 (2.96–3.85)
≥80	16	30 516	957	2.77 (2.01–3.55)
Mean temperature (°C)
<7	4	1765	102	7.87 (1.54–14.20)
7.1–13	36	111 683	5351	4.27 (3.23–5.32)
13.1–19	43	232 763	9332	4.16 (3.53–4.78)
19.1–25	18	29 550	303	0.85 (0.60–1.11)
25.1–30	6	23 504	791	3.79 (1.75–5.84)
The time from the beginning of the pandemic (days)
<15	5	8222	129	3.54 (1.84–5.23)
16–30	2	1943	69	3.05 (2.29–3.81)
31–45	12	68 370	1470	2.51 (2.05–2.97)
46–60	24	49 663	1009	1.76 (1.28–2.24)
60–75	15	22 452	614	2.59 (1.83–3.34)
76–90	27	105 317	5419	3.97 (2.98–4.96)
90–105	8	36 945	1189	3.80 (2.22–5.39)
106–120	2	3557	389	8.63 (7.72–9.54)
121–135	2	411	47	10.34 (7.42–13.26)
136–150	9	99 908	5544	5.65 (4.61–6.69)