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. 2025 Jan 28;27:e63634. doi: 10.2196/63634

Table 1.

Demographics of children and young people who (1) were invited, (2) enrolled, (3) answered the free-text question at enrollment, (4) were included in the InfraNodus analysis, and (5) were included in the manual sentiment analysis.


Invited (N=219,175) Enrolled (n=31,012) Answered free-text question (n=10,580) Included in InfraNodus analysis (n=8224) Included in sentiment analysis (n=411)
COVID-19 status at study invitation

SARS-CoV-2 positive 91,014 (41.53) 13,690 (44.14) 4743 (44.83) 3804 (46.25) 180 (43.8)

SARS-CoV-2 negative 128,161 (58.47) 17,322 (55.86) 5837 (55.17) 4420 (53.75) 231 (56.2)
Sex

Male 103,939 (47.42) 11,961 (38.57) 3920 (37.05) 2905 (35.32) 141 (34.31)

Female 115,236 (52.58) 19,051 (61.43) 6660 (62.95) 5219 (64.68) 270 (65.69)
Age (y) at study invitation

11-14 112,057 (51.13) 14,857 (47.91) 5184 (49) 3973 (48.31) 189 (45.99)

15-17 107,118 (48.87) 16,155 (52.09) 5396 (51) 4251 (51.69) 222 (54.01)
Ethnicity

Asian or Asian British a 4553 (14.68) 1581 (14.94) 1143 (13.9) 60 (14.6)

Black British, African British, or Caribbean British 933 (3.01) 343 (3.24) 264 (3.21) 18 (4.38)

White 23,198 (74.8) 7838 (74.08) 6167 (74.99) 308 (74.94)

Mixed 1615 (5.21) 564 (5.33) 464 (5.64) 21 (5.11)

Other 524 (1.69) 187 (1.77) 135 (1.64) 1 (0.24)

Prefer not to say 189 (0.61) 67 (0.63) 51 (0.62) 3 (0.73)
Region of residence (England)

East Midlands 14,109 (6.44) 2210 (7.13) 774 (7.32) 601 (7.31) 30 (7.3)

East of England 38,901 (17.75) 6047 (19.5) 1967 (18.59) 1543 (18.76) 63 (15.33)

London 46,300 (21.12) 6157 (19.85) 2107 (19.91) 1565 (19.03) 72 (17.52)

North East England 8613 (3.93) 1198 (3.86) 403 (3.81) 329 (4) 18 (4.38)

North West England 31,289 (14.28) 3606 (11.63) 1229 (11.62) 966 (11.75) 49 (11.92)

South East England 31,567 (14.40) 4917 (15.86) 1729 (16.34) 1347 (16.38) 80 (19.46)

South West England 8139 (3.71) 1514 (4.88) 499 (4.72) 396 (4.82) 25 (6.08)

West Midlands 22,681 (10.35) 3032 (9.78) 1046 (9.89) 822 (10) 37 (9)

Yorkshire and the Humber 17,576 (8.02) 2331 (7.52) 826 (7.81) 655 (7.96) 37 (9)
IMDb quintile

1 (most deprived) 54,079 (24.67) 5345 (17.24) 1813 (17.14) 1397 (16.99) 74 (18)

2 44,757 (20.42) 5548 (17.89) 1943 (18.36) 1484 (18.04) 80 (19.46)

3 39,876 (18.19) 5792 (18.68) 1985 (18.76) 1563 (19.01) 80 (19.46)

4 39,996 (18.25) 6656 (21.46) 2220 (20.98) 1764 (21.45) 91 (22.14)

5 (least deprived) 40,467 (18.46) 7671 (24.74) 2619 (24.75) 2016 (24.51) 86 (20.92)

aEthnicity data were not available for children and young people at study invitation; this was self-reported at study enrollment.

bIMD: Index of Multiple Deprivation.