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Table 1 Cohort characteristics

From: Variation in rehabilitation setting after uncomplicated total knee or hip arthroplasty: a call for evidence-based guidelines

Characteristic Knee N = 610 Hip N = 692
Public N = 240 (%) Private N = 370 (%) P-value Public N = 248 (%) Private N = 444 (%) P-value
Age mean (SD) 69.1 (8.6) 68.4 (8.4) 0.30 65.6 (10.5) 65.4 (10.4) 0.85
Female 106 (44.2) 159 (43) 0.77 129 (52) 203 (45.7) 0.11
Body mass index, mean (SD) 32.2 (6) 30.7 (5.7) 0.002 30.7 (6.6) 28.2 (4.9) <.001
Body mass index category
 Underweight (< 18.5) 0 0 0.015 3 (1.2) 1 (0.2) < 0.001
 Normal (18.5–24.9) 21 (8.8) 47 (12.7) 46 (18.5) 116 (26.1)
 Obesity Class 1 (30–34.9) 68 (28.3) 118 (31.9) 58 (23.4) 94 (21.2)
 Obesity Class 2 (35–39.9) 51 (21.3) 45 (12.2) 36 (14.5) 26 (5.9)
 Extreme Obesity Class 3 (≥40) 21 (8.8) 23 (6.2) 24 (9.7) 13 (2.9)
ASAa score
 1 18 (7.5) 39 (10.5) 0.12 21 (8.5) 72 (16.2) 0.004
 2 129 (53.8) 187 (50.5) 150 (60.5) 276 (62.2)
 3 73 (30.4) 132 (35.7) 69 (27.8) 88 (19.8)
 4 5 (2.1) 2 (0.5) 1 (0.4) 7 (1.6)
Stroke 15 (6.3) 20 (5.4) 0.66 21 (8.5) 24 (5.4) 0.12
Hypertension 183 (76.3) 231 (62.4) < 0.001 141 (56.9) 212 (47.7) 0.022
Heart disease 72 (30) 113 (30.5) 0.89 47 (19) 88 (19.8) 0.78
Kidney disease 13 (5.4) 11 (3) 0.13 10 (4) 6 (1.4) 0.024
Liver disease 6 (2.5) 13 (3.5) 0.48 8 (3.2) 6 (1.4) 0.093
Diabetes 59 (24.6) 54 (14.6) 0.002 19 (7.7) 47 (10.6) 0.21
Neurological disease 8 (3.3) 8 (2.2) 0.38 5 (2) 10 (2.3) 0.84
Respiratory disease 54 (22.5) 58 (15.7) 0.033 59 (23.8) 55 (12.4) < 0.001
Current cancer 7 (2.9) 10 (2.7) 0.88 9 (3.6) 3 (0.7) 0.004
Diagnosed mental health condition 55 (22.9) 50 (13.5) 0.003 42 (16.9) 48 (10.8) 0.022
Sleep apnoea 21 (8.8) 31 (8.4) 0.87 21 (8.5) 13 (2.9) 0.001
Previous knee or hip arthroplasty 69 (28.8) 113 (30.5) 0.64 65 (26.2) 129 (29.1) 0.42
Other low back pain/lower limb painc 113 (47.1) 172 (46.5) 0.89 140 (56.5) 211 (47.5) 0.024
Oxford Hip Score, mean (SD) n/a n/a   17 (7.9) 23.6 (8.9) < 0.001
Oxford Knee Score, mean (SD) 21 (7.8) 24.1 (8.1) <.001 n/a n/a  
EuroQol today score, median (IQR) 75 (60, 85) 75 (65, 85) 0.76 75 (50, 85) 75 (60, 85) 0.062
LOSb (days) median (IQR) 4 (4, 6) 6 (5, 7) <.001 4 (3, 6) 5 (4, 6) < 0.001
  1. Values are N (%) unless specified otherwise
  2. aAmerican Society of Anesthesiologists physical status classification
  3. bLength of stay in the acute hospital
  4. cAffecting mobility