Table 1.
Per cent (and n) distribution of demographic and socioeconomic characteristics by study
| MCS | ALSPAC-G1 | NS | BCS70 | NCDS | NSHD | BIB | USOC | GS | ALSPAC-G0 | TwinsUK | ELSA | |
| Total analytic, n | 3147 | 3430 | 3311 | 5175 | 5747 | 1569 | 1726 | 13 253 | 17 139 | 3625 | 4282 | 6508 |
| Female | 65.0 (2045) | 65.3 (2240) | 64.8 (2145) | 57.9 (2994) | 53.7 (3086) | 52.6 (825) | 100.0 (1726) | 57.9 (7668) | 67.0 (11476) | 73.1 (2651) | 89.4 (3830) | 56.3 (3663) |
| Mean age in 2020 (range) | 19.5 (18.7–20.1) | 28.4 (27–29) | 30.6 (29.9–31.4) | 50.5 (50.4–50.6) | 62.6 (62.5–62.7) | 74 | 37.5 (16–54) | 51.1 (16–96.2) | 57.0 (18–100) | 59.4 (45–89) | 61.2 (22–96) | 69.3 (52–90+) |
| Ethnicity | ||||||||||||
| White | 86.1 (2708) | 98.4 (3330) | 74.6 (2470) | NA | NA | NA | 37.8 (653) | 98.3 (16 843) | 87.2 (11 561) | 98.4 (3567) | 97.1 (4156) | 95.9 (6239) |
| South Asian | 7.6 (240) | NA | 15.0 (496) | NA | NA | NA | 56.1 (968) | 0.4 (70) | 6.7 (885) | NA | 0.7 (28) | 2.1 (135) |
| East Asian | 1.0 (30) | NA | NA | NA | NA | NA | NA | 0.3 (51) | 1.2 (155) | NA | 0.1 (3) | NA |
| Black | 2.6 (83) | NA | 3.8 (127) | NA | NA | NA | 2.0 (34) | 0.1 (21) | 2.5 (334) | NA | 1.1 (45) | 1.2 (75) |
| Mixed | 2.4 (76) | NA | 4.6 (152) | NA | NA | NA | 1.4 (24) | 0.6 (105) | 1.8 (241) | NA | 0.9 (38) | 0.9 (59) |
| Other | 0.3 (10) | NA | 2.0 (66) | NA | NA | NA | 2.7 (47) | 0.3 (49) | 0.6 (77) | NA | 0.3 (12) | NA |
| All ethnic minorities | 13.9 (439) | 2.9 (100) | 25.4 (841) | NA | NA | NA | 62.2 (1073) | 1.3 (226) | 12.8 (1692) | 1.6 (58) | 2.9 (126) | 4.1 (269) |
| Education | ||||||||||||
| Higher education or degree | 55.9 (1758) | 29.0 (994) | 48.9 (1620) | 46.6 (2411) | 46.0 (2646) | 29.0 (994) | 35.1 (556) | 50.7 (8602) | 47.1 (6238) | 29.7 (1075) | 55.7 (2386) | 25.6 (1666) |
| A-level or equivalent | 15.0 (473) | 35.1 (1203) | 23.4 (773) | 14.2 (733) | 18.0 (1034) | 35.1 (1203) | 17.2 (273) | 35.9 (6096) | 11.6 (1543) | 29.7 (1078) | 11.6 (498) | 27.6 (1798) |
| GCSE or equivalent | 19.5 (615) | 26.1 (896) | 19.0 (628) | 23.4 (1209) | 22.8 (1311) | 26.1 (896) | 22.3 (354) | 6.2(1046) | 25.2 (3341) | 30.3 (1098) | 20.5 (877) | 22.3 (1452) |
| <GCSE or none | 9.6 (301) | 9.83 (337) | 8.8 (290) | 15.9 (822) | 13.2 (756) | 9.8 (337) | 25.5 (405) | 7.2 (1214) | 16.1 (2131) | 10.3 (374) | 12.2 (521) | 24.5 (1592) |
| Social class | ||||||||||||
| Managerial, admin, professional | 51.3 (1614) | 18.0 (616) | 47.6 (1575) | 42.7 (2209) | 23.0 (1319) | 18 (616) | 31.2 (475) | 81.0 (10 716) | 35.0 (4639) | 13.4 (486) | NA | 32.4 (2111) |
| Intermediate | 15.4 (484) | 46.2 (1583) | 18.9 (625) | 21.1 (1091) | 14.9 (856) | 46.1 (1583) | 35.7 (545) | 14.4 (1906) | 17.1 (2264) | 41.2 (1492) | NA | 23.0 (1497) |
| Manual/routine | 18.9 (595) | 35.3 (1212) | 15.0 (495) | 19.5 (1009) | 16.5 (948) | 35.3 (1212) | 25.3 (386) | 4.4 (581) | 20.1 (2663) | 44.6 (1617) | NA | 28.2 (1834) |
| Other | 14.4 (454) | 0.6 (19) | 18.6 (616) | 16.7 (866) | 45.7 (2624) | 0.6 (19) | 7.8 (119) | 0.2 (27) | 27.8 (3687) | 0.8 (30) | NA | 16.4 (1066) |
| Instructed to shield | 2.5 (79) | NA | 3.3 (110) | 5.2 (267) | 6.9 (393) | 8.8 (101) | 7.6 (131) | 6.2 (825) | 7.8 (1332) | NA | 5.9 (252) | 16.3 (1062) |
Sources: Millennium Cohort Study (MCS); Children of the Avon Longitudinal Study of Parents and Children (ALSPAC-G1); Next Steps (NS); 1970 British Cohort Study (BCS70); National Child Development Study (NCDS); National Survey of Health and Development (NSHD); Born in Bradford (BIB); Understanding Society (USOC); Generation Scotland: the Scottish Family Health Study (GS); parents of ALSPAC (ALSPAC-G0); UK Adult Twin Registry (TwinsUK); English Longitudinal Study of Ageing (ELSA).
Studies are ordered by age homogeneity/heterogeneity and mean age of respondents at the time of the interview. Samples for each study are restricted to respondents with non-missing information on healthcare disruptions and valid information on sex, social class, education and (where applicable) age and ethnicity. All information about how data were collected and variables were coded is available in online supplemental file 2.
Unweighted data.
GCSE, General Certificate of Secondary Education; NA, not available/info not collected.