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Table 2 Association between physical activities measured 5 years prior and tibial cartilage volume

From: Association of physical activity and physical performance with tibial cartilage volume and bone area in young adults

  Univariable Multivariablea Multivariableb
Cartilage volume (mm3) β (95 % CI) β (95 % CI) β (95 % CI)
IPAQ Category (high vs moderate and low)    
Total tibial 276.90 (103.42, 450.39) 195.83 (56.27,335.38) 182.94 (51.84,314.04)
Medial tibial 171.64 (40.28, 303.01) 116.40 (−4.55, 237.36) 105.84 (−9.69, 221.38)
Lateral tibial 300.61 (151.29, 449.93) 206.44 (77.93, 334.96) 198.74 (72.74, 324.75)
Total PA (min/week)    
Total tibial 0.41 (0.17, 0.63) 0.28 (0.10, 0.46) 0.30 (0.13, 0.47)
Medial tibial 0.13 (0.00, 0.26) 0.07 (−0.05, 0.19) 0.08 (−0.03, 0.20)
Lateral tibial 0.28 (0.13, 0.43) 0.21 (0.08, 0.33) 0.19 (0.07, 0.32)
Vigorous PA (min/week)    
Total tibial 1.18 (0.67, 1.69) 0.55 (0.12, 0.98) 0.54 (0.13, 0.94)
Medial tibial 0.20 (−0.10, 0.51) −0.08 (−0.35, 0.22) −0.07 (−0.35, 0.20)
Lateral tibial 0.98 (0.64, 1.31) 0.61 (0.31, 0.91) 0.55 (0.26, 0.84)
Moderate PA (min/week)    
Total tibial 0.18 (−0.25, 0.62) 0.30 (−0.05, 0.65) 0.34 (0.01, 0.67)
Medial tibial 0.16 (−0.10, 0.41) 0.18 (−0.05, 0.41) 0.20 (−0.02,0.42)
Lateral tibial 0.03 (−0.26, 0.32) 0.12 (−0.13, 0.37) 0.11 (−0.14, 0.36)
Walking PA (min/week)    
Total tibial 0.50 (0.07, 0.93) 0.35 (0.01, 0.069) 0.40 (0.07, 0.72)
Medial tibial 0.18 (−0.07, 0.43) 0.12 (−0.10, 0.35) 0.15 (−0.06, 0.37)
Lateral tibial 0.32 (0.04, 0.61) 0.22 (−0.02, 0.47) 0.22 (−0.18, 0.46)
  1. aAdjusted for age, sex, duration of follow-up, body mass index, knee injury. bFurther adjusted for corresponding tibial bone area. Bold denotes statistical significance at p <0.05. IPAQ International physical activity questionnaire, PA physical activity