Table 5

Determinants of fitness at age 17 years in cohort B (data at 9 and 17 years, n=74)

β* (95% CI)P
Fitness at age 9, number of shuttles run0.19 (0.09 to 0.29)0.0003
LTPA change<0.0001
LTPA increase vs LTPA decrease4.27 (0.08 to 8.46)†0.045‡
LTPA increase vs persistently sedentary5.11 (−0.03 to 10.26)†0.052‡
LTPA increase vs persistently active−2.20 (−5.88 to 1.48)†0.40‡
LTPA decrease vs persistently sedentary0.85 (−4.35 to 6.04)†0.97‡
LTPA decrease vs ersistently active−6.47 (−10.61 to −2.78)†0.0001‡
Persistently sedentary vs persistently active−7.32 (−12.09 to −2.54)†0.0008‡
Gender (girls compared with boys)−3.87 (−6.25 to −1.52)0.0017
BMI at age 17, kg/m2−0.82 (−1.17 to −0.47)<0.0001

  • ↵* Regression coefficient for a change in fitness when the explanatory variable increases one unit.

  • ↵† Mean (95% CI) differences of least square means, that is estimated mean difference between groups.

  • ↵‡ Tukey-Kramer adjusted p values.

  • LTPA, leisure-time physical activity.