Table 1 Characteristics of individuals included in the sample with information on height at age 11, according to height group at age 11 (The Danish National Birth Cohort, 1996–2003, N = 30,923)
From: Body height and spinal pain in adolescence: a cohort study from the Danish National Birth Cohort
Characteristics | N (%) | Low height group (< 20%) | Normal height group (20–80%) | Tall height group (> 80%) |
|---|---|---|---|---|
Total | 30,923 (100) | 6,740 (21.8) | 18,882 (61.1) | 5,301 (17.1) |
Child’s sex | ||||
 Boys | 14,962 (48.4) | 3,448 (51.2) | 8,906 (47.2) | 12,608 (49.2) |
 Girls | 15,961 (51.6) | 3,292 (48.8) | 9,976 (52.8) | 2,693 (50.8) |
Gestational age | ||||
 Term | 29,335 (94.9) | 6,284 (93.3) | 17,972 (95.2) | 5,079 (95.8) |
 Preterm (< 37 weeks) | 1,588(5.1) | 456 (6.8) | 910 (4.8) | 222 (4.2) |
Parity | ||||
 Nulliparous | 15,044 (48.7) | 3,282 (48.7) | 9,135 (48.4) | 2,627 (49.6) |
 Parous | 15,879 (51.4) | 3,458 (51.3) | 9,747 (51.6) | 2,674 (50.4) |
Parental educational level | ||||
 High | 20,057 (64.9) | 4,321 (64.1) | 12,323 (65.3) | 3,413 (64.4) |
 Medium | 10,165 (32.9) | 2,230 (33.1) | 6,167 (32.7) | 1,768 (33.4) |
 Low | 701 (2.3) | 189 (2.8) | 392 (2.1) | 120 (2.3) |
Equivalized household income | ||||
 4th quartile (highest) | 10,482 (33.9) | 2,138 (31.7) | 6,495 (34.4) | 1,849 (34.9) |
 3rd quartile | 9,087 (29.4) | 1,988 (29.5) | 5,491 (29.1) | 1,608 (30.3) |
 2nd quartile | 7,121 (23.0) | 1,618 (24.0) | 4,366 (23.1) | 1,137 (21.5) |
 1st quartile (lowest) | 4,233 (13.4) | 996 (14.8) | 2,530 (13.4) | 707 (13.3) |