Table 1.
Weighted and Age-Standardized Seroprevalence of Severe Acute Respiratory Syndrome Coronavirus 2 Antibodies by Sex, Sociodemographic Characteristics, and Medical History in Population-Based Surveys After Omicron Peak—Conakry, Guinea and Yaounde, Cameroon, 2022
| Characteristic | Guinea | Cameroon | ||||||
|---|---|---|---|---|---|---|---|---|
| Participants Tested | Seropositive (IgG Anti-SP+ and IgG Anti-NC+) |
Participants Tested | Seropositive (IgG Anti-SP+ and Anti-NC+) |
|||||
| (n = 1386) | No. (%) | 95% CI | P Value | (n = 1425) | No. (%) | 95% CI | P Value | |
| Age, y | .0000 | .0000 | ||||||
| 0–19 | 740 | 476 (64.32) | 59.51–68.87 | 443 | 297 (67.19) | 62.55–71.52 | ||
| 20–39 | 370 | 290 (78.38) | 73.34–82.69 | 601 | 496 (82.50) | 79.16–85.41 | ||
| ≥40 | 276 | 232 (84.06) | 77.65–88.89 | 381 | 322 (84.47) | 80.33–87.88 | ||
| Sex | 1386 | .0001 | 1425 | .0008 | ||||
| Female | 838 | 631 (74.52) | 70.38–78.26 | 783 | 640 (78.92) | 75.29–82.15 | ||
| Male | 548 | 367 (67.26) | 61.97–72.14 | 642 | 475 (69.98) | 65.81–73.84 | ||
| Marital status | 1383 | .0000 | 1409 | .0000 | ||||
| Single | 939 | 632 (71.08) | 66.65–75.14 | 873 | 648 (73.22) | 69.89–76.30 | ||
| Married/partnership | 398 | 327 (64.50) | 42.10–81.95 | 436 | 369 (74.92) | 38.71–93.39 | ||
| Divorced/separated/widow(er) | 46 | 36 (32.15) | 18.95–48.99 | 100 | 85 (59.53) | 30.04–83.44 | ||
| Education | 1376 | .0000 | 1420 | .0000 | ||||
| Primary school | 548 | 376 (72.49) | 66.79–77.54 | 374 | 280 (75.59) | 70.73–79.87 | ||
| Secondary school | 365 | 286 (78.27) | 70.63–84.36 | 624 | 510 (82.46) | 78.43–85.87 | ||
| University | 138 | 119 (94.15) | 91.38–96.07 | 319 | 276 (86.42) | 65.36–95.55 | ||
| None | 325 | 211 (59.77) | 53.91–65.37 | 103 | 47 (48.69) | 34.97–62.60 | ||
| Household size | 1386 | .0548 | 1418 | .11 | ||||
| ≤6 persons | 244 | 187 (75.67) | 68.53–81.62 | 910 | 726 (74.10) | 70.24–77.61 | ||
| 7-13persons | 384 | 291 (74.9) | 66.51–81.77 | 400 | 293 (72.77) | 68.00–77.06 | ||
| >13 persons | 758 | 520 (68.87) | 64.46–72.97 | 108 | 90 (82.36) | 73.07–88.93 | ||
| No. of symptoms | 1243 | .4582 | 1361 | .8722 | ||||
| No | 313 | 231 (74.28) | 69.26–78.74 | 857 | 663 (74.83) | 71.46–77.91 | ||
| 1–2 symptoms | 458 | 328 (71.88) | 67.07–76.24 | 233 | 189 (74.65) | 66.90–81.09 | ||
| 3–5 symptoms | 351 | 255 (71.49) | 64.43–77.64 | 210 | 158 (71.72) | 63.28–78.86 | ||
| >5 symptoms | 121 | 82 (64.68) | 56.98–71.68 | 61 | 49 (74.43) | 57.67–86.15 | ||
| Previous COVID-19 testing | 1325 | .0008 | 1409 | .003 | ||||
| Never tested | 1217 | 857 (70.62) | 66.54–74.40 | 1159 | 891 (74.01) | 71.10–76.70 | ||
| Tested | 108 | 95 (93.88) | 89.49–96.50 | 250 | 211 (82.13) | 71.59–89.34 | ||
| Vaccination | 1373 | .0000 | 1415 | .1174 | ||||
| Fully vaccinated | 314 | 256 (78.63) | 68.70–86.05 | 100 | 81 (36.52) | 32.36–40.90 | ||
| Partially vaccinated | 191 | 151 (77.63) | 69.99–83.78 | 11 | 11 (46.93) | 46.93–46.93 | ||
| Unvaccinated | 868 | 580 (69.60) | 65.50–73.41 | 1304 | 1015 (74.80) | 72.04–77.38 | ||
| Overall | 1386 | 998 (71.57) | 67.48–75.33 | 1425 | 1115 (74.71) | 71.99–77.25 | ||
Abbreviations: CI, confidence interval; COVID-19, coronavirus disease; IgG, immunoglobulin G; NC, nucleocapsid protein; SP, spike protein.