Table 1 Demographic and treatment characteristics of the study population & validity and reliability cohortsÂ
|  | Study population N = 83 | Validity cohort N = 66 | Reliability cohort N = 56 | P value |
|---|---|---|---|---|
Centre | 1.000 | |||
 Surrey: n (%) | 62 (74.7) | 52 (78.8) | 44 (78.6) | |
 Newcastle: n (%) | 21 (25.3) | 14 (21.2) | 12 (21.4) | |
Age (years) | 0.943 | |||
 mean (SD) | 68.2 (7.4) | 68.1 (7.0) | 68.2 (7.3) | |
 range | 47–83 | 47–83 | 47–83 | |
  ≤ 60 n (%) | 14 (16.9) | 10 (15.2) | 9 (16.1) | |
  >  60 n (%) | 69 (83.1) | 56 (84.8) | 47 (83.9) | |
Ethnicity | 0.199 | |||
 White: n (%) | 80 (96.4) | 63 (95.4) | 53 (94.6) | |
 Black Caribbean: n (%) | 2 (2.4) | 2 (3.0) | 2 (3.6) | |
 Black African: n (%) | 1 (1.2) | 1 (1.5) | 1 (1.8) | |
Treatment (men had combined treatments) | 0.996 | |||
 Surgery: n (%) | 53 (63.9) | 43 (65.1) | 36 (64.3) | |
 Radiotherapy: n (%) | 26 (31.3) | 23 (34.8) | 19 (33.9) | |
 Brachytherapy: n (%) | 3 (3.6) | 3 (4.5) | 3 (5.3) | |
 ADT: n (%) | 32 (38.6) | 26 (39.4) | 21 (37.5) | |
Smoking status | 0.926 | |||
 Non smoker: n (%) | 45 (54.2) | 36 (54.5) | 32 (57.1) | |
 Ex-smoker: n (%) | 28 (33.7) | 23 (34.8) | 19 (33.9) | |
 Smoker: n (%) | 3 (3.6) | 3 (4.5) | 3 (5.4) | |
 Missing: n (%) | 7 (8.4) | 4 (6.1) | 2 (3.6) | |
Retirement | 0.970 | |||
 Yes: n (%) | 19 (22.9) | 16 (24.2) | 14 (25.0) | |
 No: n (%) | 54 (65.1) | 42 (63.6) | 36 (64.3) | |
 Missing: n (%) | 10 (12.0) | 8 (12.1) | 6 (10.7) | |
Height (cm): mean (SD) | 175.5 (6.5) | 175.9 (6.5) | 175.5 (6.6) | 0.713 |
Weight (kg): mean (SD) | 89.2 (11.8) | 88.6 (11.6) | 88.7 (11.2) | 0.980 |
Diabetes: n (%) | 7 (8.4) | 4 (6.1) | 3 (5.3) | 1.000 |
Resting blood pressure, systolic (mmHg): mean (SD) | 135.7 (15.3) | 135.3 (15.1) | 136.5 (15.1) | 0.651 |
Resting blood pressure, diastolic (mmHg): mean (SD) | 81.4 (10.0) | 80.7 (9.1) | 81.0 (9.2) | 0.853 |
Waist circumference (cm): mean (SD) | 102.2 (9.7) | 101.4 (9.4) | 101.7 (9.0) | 0.886 |
Hip circumference (cm): mean (SD) | 105.5 (7.6) | 104.7 (7.3) | 104.8 (6.8) | 0.921 |
Grip strength (kg): mean (SD) | 38.4 (8.4) | 39.3 (7.6) | 39.2 (7.8) | 0.934 |
Chair sit to stand (number completed): median (IQR) | 13 (5) | 13 (5) | 13 (5) | 0.608 |
Charlson co-morbidity index (CCI): median (IQR) | 6 (3) | 5 (2.5) | 6 (3) | 0.848 |