Table 1 Demographic characteristics of healthy children in Hainan province
Variable | Haikou (n = 764) | Wanning (n = 645) | Baisha (n = 450) | Qiongzhong (n = 474) | Total (n = 2333) | P value |
|---|---|---|---|---|---|---|
Age (months), median (IQR) | 29 (14–45) | 32 (16–48) | 27 (16–45) | 29 (14–45) | 30 (15–46) | 0.1107 |
Age group, n | ||||||
 < 12 months | 148 | 109 | 88 | 98 | 443 | 0.5802 |
 12–23 months | 156 | 125 | 91 | 95 | 467 | |
 24–35 months | 151 | 118 | 93 | 93 | 455 | |
 36–47 months | 152 | 126 | 88 | 94 | 460 | |
 ≥ 48 monthsa | 157 | 167 | 90 | 94 | 508 | |
Gender, n | ||||||
 Male | 430 | 355 | 232 | 242 | 1259 | 0.2019 |
 Female | 334 | 290 | 218 | 232 | 1074 | |
Number of swabs positive for pneumococcus, n (%) | 213 (27.9) | 221 (34.3) | 145 (32.2) | 131 (27.6) | 710 (30.4) | 0.0261 |
Percentage of PCV13 immunization, n (%) | 233(30.5) | 42(6.5) | 30(6.7) | 22(4.6) | 327(14.0) | < 0.001 |
 1 dose | 41 | 16 | 7 | 11 | 75 | |
 2 doses | 29 | 12 | 10 | 6 | 57 | |
 3 doses | 63 | 4 | 9 | 4 | 80 | |
 4 doses | 100 | 10 | 4 | 1 | 115 | |