Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 1 Characteristics of study population†

From: Association of age, sex and BMI with the rate of change in tibial cartilage volume: a 10.7-year longitudinal cohort study

 Age 50–60 years (n = 256)Age 60–70 years (n = 181)Age 70–80 years (n = 44)p value
Age (year)55.9 (2.3)64.7 (3.0)73.3 (2.3)< 0.001
Females, %5248450.604
BMI (kg/m2)27.9 (4.8)27.4 (3.9)27.6 (3.9)0.580
Radiographic OA, %5659720.170
 Joint space narrowing5658720.173
 Osteophytes61150.128
Tibial bone size (mm2)3279.9 (469.5)3366.6 (498.0)3382.1 (558.5)0.190
WOMAC pain score (0–45), median (IQR)0.5 (0 to 4)0 (0 to 3)1 (0 to 4)0.541
 Any pain, %5046520.612
WOMAC function score (0–153), median (IQR)0 (0 to 8.5)1 (0 to 7)4.5 (0 to 16)0.095
 Any functional disability, %4953680.057
History of knee surgery, %11970.741
History of knee injury, %*141090.413
Physical activity (steps/day)9639.8 (3239.9)9172.3 (3128.9)7625.0 (2803.0)< 0.001
Cartilage volume (mm3)
 Medial tibial1509.5 (398.1)1523.8 (449.3)1438.6 (397.0)0.479
 Lateral tibial2096.4 (591.5)2046.9 (651.5)1803.2 (599.9)0.015
 Total tibial3606.0 (917.1)3570.7 (1018.6)3241.8 (907.5)0.065
  1. BMI body mass index, IQR interquartile range, OA osteoarthritis, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index
  2. Data are presented as mean (standard deviation) unless specified otherwise (e.g. percentage, median (IQR)). Italicised data denotes statistically significant result
  3. p values are calculated using chi-square tests, analysis of variance or the Kruskal-Wallis test
  4. *History of knee injury was assessed at the 2.7 -year follow-up