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Table 1 Description of the study sample (n = 25 655)

From: Changes over time in latent patterns of childhood-to-adulthood BMI development in Great Britain: evidence from three cohorts born in 1946, 1958, and 1970

  Total sample
(n = 25 655)
NSHD 1946
(n = 3 693)
1958 NCDS
(n = 12 519)
1970 BCS
(n = 9 443)
  Missing
(n (%))
  Missing
(n (%))
  Missing
(n (%))
  Missing
(n (%))
Sex
Males n (%) 12 465 (48.6) 1 872 (50.7) 6 291 (50.3) 4 302 (45.6)
Females n (%) 13 190 (51.4) 1 821 (49.3) 6 228 (49.7) 5 141 (54.4)
Ethnicity
White British n (%) 24 884 (97.4) 103 (0.4) 3 693 (100) 0 12 235 (97.8) 6 (0.05) 8 956 (95.8) 97 (1.03)
 Othera n (%) 668 (2.6) 0 278 (2.2) 390 (4.2)
Birthweight (kg) Mean (SD) 3.3 (0.5) 1 686 (6.6) 3.4 (0.5) 14 (0.04) 3.3 (0.5) 1 013 (8.1) 3.3 (0.5) 659 (7.0)
Childhood social class
Professional n (%) 1 190 (5.3) 3 031 (11.8) 205 (6.3) 447 (12.1) 505 (4.7) 1 683 (13.4) 480 (5.6) 901 (9.5)
Intermediate n (%) 5 032 (22.2) 637 (19.6) 2 191 (20.2) 2204 (25.8)
Skilled non-manual n (%) 2 630 (11.6) 513 (15.8) 1 163 (10.7) 954 (11.2)
Skilled manual n (%) 8 901 (39.3) 1 088 (33.5) 4 475 (41.3) 3 338 (39.1)
Partly skilled manual n (%) 3 301 (14.6) 618 (19.0) 1 600 (14.8) 1 083 (12.7)
Unskilled manual n (%) 1 570 (6.9) 185 (5.7) 902 (8.3) 483 (5.7)
Mother left education at mandatory leaving age
Yes n (%) 16 862 (69.5) 1388 (5.4) 2 418 (71.3) 301 (8.2) 8 792 (74.0) 637 (5.1) 5652 (62.9) 450 (4.8)
Father left education at mandatory leaving age
Yes n (%) 15 744 (69.4) 2 955 (11.5) 2 313 (69.0) 342 (9.3) 3 029 (74.5) 635 (5.1) 2 889 (61.3) 1 978 (21.0)
  1. aOther ethnicities: White other, Mixed race, Indian, Pakistani, Bangladeshi, Other Asian, Caribbean, African, Other Black, Chinese