Table 1

Characteristics of participants in childhood (1985) and adulthood (2004–2006), by sex and baseline age group

MalesFemales
Baseline Age (years)Mean (SD)Median (IQR)Mean (SD)Median (IQR)p*
Baseline (childhood)
Age (years)9–1211 (1)11 (10, 12)10 (1)11 (10, 11)0.66
13–1514 (1)14 (13, 15)14 (1)14 (13, 15)0.75
Total weekly PA (min/week)9–12384 (325)295 (170, 510)366 (340)273 (160, 472)0.15
13–15570 (504)445 (240, 720)462 (443)345 (210, 580)<0..01
Leisure PA (min/week)9–12216 (301)120 (0, 300)185 (282)91 (15, 240)0.14
13–15332 (441)200 (60, 450)250 (403)120 (30, 300)<0..01
Transport PA (min/week)9–1249 (90)20 (0, 70)49 (108)15 (0, 58)0.14
13–1556 (89)25 (0, 80)54 (72)20 (0, 100)0.59
School sport (min/week)9–1263 (78)50 (0, 90)76 (125)60 (0, 90)0.30
13–1585 (152)40 (0, 120)68 (119)20 (0, 90)0.10
School PE (min/week)9–1256 (69)40 (0, 70)56 (79)38 (0, 78)0.83
13–1598 (114)80 (0, 150)91 (103)80 (40, 120)0.99
Past year sport (n)9–123 (1)2 (1, 3)2 (1)2 (1, 3)0.13
13–153 (2)3 (2, 4)3 (2)2 (1, 3)0.04
Follow-up (adulthood)
Age (years)9–1230 (2)30 (29, 31)30 (2)30 (29, 31)<0.01
13–1534 (1)34 (33, 35)33 (2)33 (32, 34)0.09
Total weekly PA (min/week)9–12772 (521)678 (377, 1064)750 (485)660 (360, 1050)0.70
13–15811 (573)659 (170, 1194)795 (509)712 (390, 1125)0.72
Daily steps9–128995 (3352)8533 (6609, 10869)8981 (3100)8543 (6802, 11068)0.82
13–159615 (3800)9130 (6941, 11831)9031 (3183)8827 (6882, 10723)0.07
Leisure PA (min/week)9–12168 (216)93 (0, 240)157 (186)110 (20, 240)0.74
13–15168 (220)100 (0, 240)148 (186)90 (0, 219)0.42
Transport PA (min/week)9–12103 (164)40 (0, 140)108 (160)60 (0, 140)0.04
13–15109 (179)37 (0, 140)94 (143)44 (0, 145)0.64
  • * p values from Kruskal–Wallis equality-of-populations rank test; bold indicates statistically significant difference between males and females (p<0.05).

  • PA, physical activity; PE, physical education.