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Table 2 Characteristics of the study population, constituting individuals with and without HBM, who were followed up at 8 years

From: Increased development of radiographic hip osteoarthritis in individuals with high bone mass: a prospective cohort study

  All, N = 136 HBM, N = 86 Relatives without HBM, N = 50 p value for difference
  N (%)  
Female gender 98 (72.1) 73 (84.9) 25 (50.0) < 0.001
Postmenopausalb 75 (76.5) 59 (80.8) 16 (64.0) 0.087
Menopause transition during the follow-up period 11 (11.2) 6 (8.2) 5 (20.0) 0.177
History of HRT usef 49 (50.0) 39 (53.4) 10 (40.0) 0.508
History of smokingf 66 (48.9) 42 (49.4) 24 (48.0) 0.874
Physical activity categoryb
Low 14 (10.7) 9 (11.0) 5 (10.2)  
Medium 46 (35.1) 26 (31.7) 20 (40.8) 0.567
High 71 (54.2) 47 (57.3) 24 (49.0)  
Education categoryf
Up to GCSE/O level 55 (42.0) 42 (50.0) 13 (27.7)  
A level or equivalent 26 (19.9) 17 (20.2) 9 (19.2) 0.019
Degree or equivalent 50 (38.2) 25 (29.8) 25 (53.2)  
  Mean (SD)  
Age, yearsb 59.2 (10.2) 60.2 (9.9) 57.5 (10.6) 0.136
Height, cmb 167.8 (9.6) 166.1 (8.4) 170.8 (10.8) 0.005
Weight, kgb 81.5 (17.0) 82.1 (16.0) 80.6 (18.7) 0.619
BMI (kg/m2)b 28.9 (5.5) 29.8 (5.6) 27.5 (5.1) 0.017
TBFM (kg)f 31.6 (10.6) 33.0 (10.9) 29.1 (9.5) 0.035
TH-BMD, g/cm2 b 1.143 (0.182) 1.242 (0.129) 0.976 (0.131) < 0.001
L1-BMD, g/cm2 b 1.255 (0.215) 1.377 (0.149) 1.049 (0.141) < 0.001
Follow-up time, years 8.2 (1.0) 8.2 (0.7) 8.2 (1.4) 0.817
  1. Abbreviations: HBM high bone mass, HRT hormone replacement therapy, BMI body mass index, TBFM total body fat mass, TH-BMD total hip bone mineral density
  2. bAssessed at baseline
  3. fAssessed as follow-up