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Table 1 Descriptive statistics for the total sample and within sex groups (means and standard deviations)

From: Body mass index and physical fitness among Chinese adolescents from Shandong Province: a cross-sectional study

  Total Sample
(N = 27,955)
Girls
(n = 13,791)
Boys
(n = 14,164)
Age (years) 14.4 (1.8) 14.4 (1.8) 14.3 (1.8)
BMI (kg/m2) 20.2 (3.6) 19.9 (3.3) 20.5 (4.0)
Sprint Run (sec) 8.7 (1.3) 9.2 (1.2) 8.2 (1.2)
Long Jump (cm) 180.5 (43.6) 165.6 (31.3) 194.5 (48.7)
Sit-and-Reach (cm) 11.6 (7.6) 13.3 (7.0) 9.9 (7.7)
Girl Distance Run (sec) 247.9 (40.9)
Boy Distance Run (sec) 272.7 (53.5)
Sit-up (Girls; reps) 31.8 (10.6)
Pull-up (Boys; reps) 5.1 (5.5)
  1. BMI stands for Body Mass Index; bold denotes statistical significance, p ≤ 0.05