Table 1.
Characteristics of unmatched vaccinated newborns in Songjiang District, Shanghai, 2017–2020.
| Characteristics | level | Unmatched cohort |
Matched cohort of at least 1 dose PCV13 vaccination |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Overall (N = 25,668) |
Unvaccinated Controls (N = 15,471) |
Vaccinated Children (N = 10,197) |
p | Overall (N = 12,970) |
No Vaccine Exposure (N = 6,485) | Vaccine Exposure (N = 6,485) | p | ||
| Age (mean (SD)) | 25.44 (13.29) | 27.62 (13.82) | 22.12 (11.68) | <0.001* | 24.62 (11.99) | 24.63 (11.99) | 24.60 (11.98) | 0.906 | |
| Age group (%) | 0 to 11 m | 4767 (18.6) | 2513 (16.2) | 2254 (22.1) | <0.001* | 2192 (16.9) | 1096 (16.9) | 1096 (16.9) | 0.998 |
| 12 to 23 m | 6715 (26.2) | 3355 (21.7) | 3360 (33.0) | 3811 (29.4) | 1902 (29.3) | 1909 (29.4) | |||
| 24 to 35 m | 6869 (26.8) | 3815 (24.7) | 3054 (29.9) | 4102 (31.6) | 2050 (31.6) | 2052 (31.6) | |||
| 36 to 48 m | 7317 (28.5) | 5788 (37.4) | 1529 (15.0) | 2865 (22.1) | 1437 (22.2) | 1428 (22.0) | |||
| Sex (%) | Male | 13,304 (51.8) | 8079 (52.2) | 5225 (51.2) | 0.127 | 6706 (51.7) | 3353 (51.7) | 3353 (51.7) | 1 |
| Female | 12,364 (48.2) | 7392 (47.8) | 4972 (48.8) | 6264 (48.3) | 3132 (48.3) | 3132 (48.3) | |||
| Address (%) | Other | 51 (0.2) | 43 (0.3) | 8 (0.1) | <0.001* | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 |
| Chedun | 491 (1.9) | 311 (2.0) | 180 (1.8) | 138 (1.1) | 69 (1.1) | 69 (1.1) | |||
| Dongjing | 808 (3.1) | 437 (2.8) | 371 (3.6) | 334 (2.6) | 167 (2.6) | 167 (2.6) | |||
| Fangsong | 6453 (25.1) | 4674 (30.2) | 1779 (17.4) | 3248 (25.0) | 1624 (25.0) | 1624 (25.0) | |||
| Guangfulin | 20 (0.1) | 17 (0.1) | 3 (0.0) | 2 (0.0) | 1 (0.0) | 1 (0.0) | |||
| Jiuting | 3627 (14.1) | 1920 (12.4) | 1707 (16.7) | 2176 (16.8) | 1088 (16.8) | 1088 (16.8) | |||
| Liiugang | 238 (0.9) | 175 (1.1) | 63 (0.6) | 36 (0.3) | 18 (0.3) | 18 (0.3) | |||
| Sheshan | 1037 (4.0) | 566 (3.7) | 471 (4.6) | 432 (3.3) | 216 (3.3) | 216 (3.3) | |||
| Shihudang | 200 (0.8) | 124 (0.8) | 76 (0.7) | 32 (0.2) | 16 (0.2) | 16 (0.2) | |||
| Sijing | 3045 (11.9) | 1625 (10.5) | 1420 (13.9) | 1818 (14.0) | 909 (14.0) | 909 (14.0) | |||
| Xiaokunshan | 384 (1.5) | 273 (1.8) | 111 (1.1) | 78 (0.6) | 39 (0.6) | 39 (0.6) | |||
| Xinbang | 181 (0.7) | 152 (1.0) | 29 (0.3) | 12 (0.1) | 6 (0.1) | 6 (0.1) | |||
| Xinqiao | 2034 (7.9) | 991 (6.4) | 1043 (10.2) | 1082 (8.3) | 541 (8.3) | 541 (8.3) | |||
| Yexie | 478 (1.9) | 328 (2.1) | 150 (1.5) | 116 (0.9) | 58 (0.9) | 58 (0.9) | |||
| Yongfeng | 2436 (9.5) | 1546 (10.0) | 890 (8.7) | 1294 (10.0) | 647 (10.0) | 647 (10.0) | |||
| Yueyang | 2101 (8.2) | 1217 (7.9) | 884 (8.7) | 1094 (8.4) | 547 (8.4) | 547 (8.4) | |||
| Zhongshan | 2084 (8.1) | 1072 (6.9) | 1012 (9.9) | 1078 (8.3) | 539 (8.3) | 539 (8.3) | |||
*
p < 0·01.