Table 1. Sample characteristics.
| Variable | n | Total group | THA | TKA |
|---|---|---|---|---|
| n = 97 | n = 146 | |||
| Sex (n (%)) | 243 | |||
| Female | 138 (57) | 56 (58) | 89 (56) | |
| Median age (yrs (IQR)) | 243 | 56 (51–59) | 56 (50–60) | 56 (52–59) |
| Body mass index (kg/m2) (mean (SD)) | 238 | 28.8 (5.2) | 27.3 (4.9) | 29.9 (5.2) |
| Highest level of education (n (%)) | 238 | |||
| lower (Elementary school, vocational education) | 80 (34) | 31 (32) | 49 (35) | |
| secondary (high school, intermediate vocational education) | 106 (45) | 39 (41) | 67 (47) | |
| higher (higher professional education, university) | 52 (22) | 26 (27) | 28 (18) | |
| Partner (ref = no) (n (%)) | 242 | 225 (93) | 89 (93) | 136 (93) |
| Number of comorbidities (mean (SD)) | 242 | 2.3 (1.5) | 2.1 (1.5) | 2.4 (1.5) |
| Work demands (n (%)) | 237 | |||
| physical | 71 (30) | 27 (28) | 44 (31) | |
| mental | 73 (31) | 31 (32) | 42 (30) | |
| mixed | 93 (39) | 38 (40) | 55 (39) | |
| Time to return to work (days) (mean (SD)) | 175 | 89 (67) | 85 (69) | 93 (71) |
| Return to work (n (%)) | 175 | |||
| 6 weeks | ||||
| partial | 37 (19) | 17 (21) | 20 (18) | |
| full | 13 (7) | 7 (9) | 6 (6) | |
| 3 months | ||||
| partial | 71 (36) | 27 (35) | 44 (36) | |
| full | 57 (29) | 25 (32) | 32 (26) | |
| 6 months | ||||
| partial | 45 (24) | 16 (21) | 29 (26) | |
| full | 118 (63) | 51 (68) | 67 (59) | |
| 12 months | ||||
| partial | 19 (10) | 7 (10) | 12 (11) | |
| full | 153 (84) | 61 (84) | 92 (84) | |
| Total physical functioning score (WOMAC) (mean (SD)) | 242 | 43 (17) | 42 (17) | 44 (17) |
| Total minutes physical activity per week (SQUASH) (mean (SD)) | 241 | 3005 (1378) | 3097 (1443) | 2944 (1334) |
| Total minutes leisure-time physical activity per week (SQUASH) (mean (SD)) | 229 | 587 (768) | 667 (881) | 527 (677) |
All numbers are represented as mean with standard deviation (SD), numbers (n) and percentages (%) or interquartile range (IQR)