Table 1. Baseline and Clinical Characteristics of Children Registered With QResearch Practices Between January 24, 2020, and November 30, 2020a.
| Characteristic | Total population | No. of SARS-CoV-2 tests | Tested for SARS-CoV-2 per total population, % |
|---|---|---|---|
| Total | 2 576 353 | 410 726 | 15.9 |
| Sex | |||
| Male | 1 318 747 (51.2) | 213 157 (51.9) | 16.1 |
| Female | 1 257 606 (48.8) | 197 569 (48.1) | 15.7 |
| Age, mean (SD), y | 9.23 (5.24) | 9.28 (5.41) | NA |
| Age categories | |||
| 0-3 mo | 61 116 (2.4) | 8348 (2.0) | 13.7 |
| 3-12 mo | 130 110 (5.1) | 23 984 (5.8) | 18.4 |
| 2-5 y | 557 318 (21.6) | 93 316 (22.7) | 16.7 |
| 6-10 y | 725 819 (28.2) | 106 440 (25.9) | 14.7 |
| 11-15 y | 707 095 (27.5) | 108 575 (26.4) | 15.4 |
| 16-18 y | 394 895 (15.3) | 70 063 (17.1) | 17.7 |
| Race | |||
| White | 1 311 041 (50.9) | 223 701 (78.9) | 17.1 |
| Asian | 243 545 (9.5) | 33 213 (11.7) | 13.6 |
| Black | 93 620 (3.6) | 7727 (2.7) | 8.3 |
| Mixed or other | 147 529 (5.7) | 18 971 (6.7) | 12.9 |
| Not recorded | 780 618 (30.3) | 127 114 (30.9) | 16.3 |
| Townsend deprivation quintile | |||
| 1 (Least deprived) | 527 452 (20.5) | 95 949 (23.6) | 18.2 |
| 2 | 547 532 (21.3) | 96 475 (23.7) | 17.5 |
| 3 | 542 116 (21.0) | 88 858 (21.8) | 16.4 |
| 4 | 509 671 (19.8) | 74 096 (18.2) | 14.5 |
| 5 (Most deprived) | 429 060 (16.7) | 51 598 (12.7) | 12.0 |
| Not recorded | 20 522 (0.8) | 3750 (0.9) | 18.3 |
| Geographic region of England | |||
| East Midlands | 48 887 (1.9) | 7977 (1.9) | 16.3 |
| East of England | 98 280 (3.8) | 14 980 (3.7) | 15.2 |
| London | 669 444 (26.0) | 82 965 (20.2) | 12.4 |
| North East | 51 775 (2.0) | 10 087 (2.5) | 19.5 |
| North West | 473 994 (18.4) | 95 702 (23.3) | 20.2 |
| South Central | 341 774 (13.3) | 54 145 (13.2) | 15.8 |
| South East | 283 721 (11.0) | 33 246 (10.8) | 11.7 |
| South West | 242 585 (9.4) | 38 114 (9.3) | 15.7 |
| West Midlands | 284 207 (11.0) | 48 147 (11.7) | 16.9 |
| Yorkshire and Humber | 81 686 (3.2) | 14 363 (3.5) | 17.6 |
| Household size (No. of people) | |||
| 2 | 383 616 (14.9) | 64 635 (15.7) | 16.8 |
| 3-5 | 1 549 068 (60.1) | 253 123 (61.6) | 16.3 |
| 6-9 | 246 764 (9.6) | 30 806 (7.5) | 12.5 |
| ≥10 | 35 396 (1.4) | 3950 (1.0) | 11.2 |
| Not recordedb | 361 509 (14.0) | 58 212 (14.2) | 16.1 |
| Comorbidities | |||
| No relevant comorbidities | 2 348 326 (91.1) | 362 649 (88.3) | 15.4 |
| Asthma | 183 089 (7.1) | 37 519 (9.1) | 20.5 |
| Diabetes (type 1) | 4916 (0.2) | 1166 (0.3) | 23.7 |
| Cerebral palsy | 3927 (0.2) | 1153 (0.3) | 29.4 |
| Epilepsy | 12 972 (0.5) | 3213 (0.8) | 24.8 |
| Congenital heart disease | 21 523 (0.8) | 4694 (1.1) | 21.8 |
| Sickle cell disease | 1600 (0.1) | 332 (0.1) | 20.8 |
Abbreviation: IQR, interquartile range.
a
Data are presented as number (percentage) unless otherwise indicated.
b
Household size 1 (single occupant) was reclassified as not recorded.