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Table 4 Fixed-effect parameter estimates from the multi-level ordered logistic models

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

Fitness Test SES Strata Total Sample OR
(95% C.I.)
Girls OR
(95% C.I.)
Boys OR
(95% C.I.)
BMI (kg/m2) 50,000– 1.41† 1.39† 1.51†
99,999 RMB (1.29, 1.53) (1.22, 1.58) (1.31, 1.75)
  0–49,999 1.42† 1.38† 1.55†
RMB (1.30, 1.55) (1.21, 1.57) (1.34, 1.80)
Dash Run (sec) 50,000– 0.79† 0.68† 0.91
99,999 RMB (0.70, 0.88) (0.60, 0.73) (0.82, 1.02)
  0–49,999 0.63† 0.58† 0.71†
RMB (0.55, 0.72) (0.52, 0.66) (0.63, 0.79)
Long Jump (cm) 50,000– 0.70† 0.71† 1.00
99,999 RMB (0.66, 0.76) (0.65, 0.79) (0.91, 1.11)
  0–49,999 0.95† 0.76† 1.01
RMB (0.86, 0.99) (0.69, 0.84) (0.91, 1.11)
Sit-and-Reach (cm) 50,000– 0.51† 1.49† 0.63†
99,999 RMB (0.47, 0.55) (1.34, 1.65) (0.57, 0.70)
  0–49,999 0.62† 0.59† 0.71†
RMB (0.58, 0.68) (0.53, 0.65) (0.64, 0.78)
Girl Distance Run (sec) 50,000–   18.5†  
99,999 RMB   (4.6, 32.5)  
  0–49,999   26.8†  
RMB   (11.8, 41.8)  
Boy Distance Run (sec) 50,000–    0.52†
99,999 RMB    (0.47, 0.57)
  0–49,999    0.54†
RMB    (0.49, 0.60)
Sit-ups (Girls; reps) 50,000–   0.72†  
99,999 RMB   (0.64, 0.81)  
  0–49,999   0.51†  
RMB   (0.46, 0.58)  
Pull-ups (Boys; reps) 50,000–    1.03
99,999 RMB    (0.92, 1.15)
  0–49,999    1.15†
RMB    (1.03, 1.29)
  1. OR stands for Odds Ratio that is adjusted for clustering within Region and age; 95% C.I. stands for the 95% Confidence Interval; RMB stands for Renminbi; BMI stands for Body Mass Index; SES stands for Socio-Economic Status; referent for SES is ≥100,000 RMB; bold and † denotes statistical significance, p ≤ 0.05