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Table 2 Characteristics of total hip arthroplasty recipients: Pre-matching

From: The effectiveness of inpatient rehabilitation after uncomplicated total hip arthroplasty: a propensity score matched cohort

  Inpatient Rehabilitation Group, n = 141 No Inpatient Rehabilitation Group, n = 290 Standardized Mean Difference P-value
Age, mean (SD), y 68.7 (9.9) 63.7 (10.4) 0.50 < 0.001
Male, % (n) 68.1 (96) 47.6 (138) 0.42 < 0.001
BMI, mean (SD) 27.7 (4.9) 28.2 (4.9) 0.11 0.27
Education, % (n)
 1 1.4 (2) 1.4 (4) 0.0 0.97
 2 21.3 (30) 18.3 (53) 0.08 0.46
 3 56.7 (80) 51.4 (149) 0.11 0.30
 4 20.6 (29) 29.0 (84) 0.20 0.06
ASA, % (n)
 1 9.2 (13) 19.1 (55) 0.29 0.009
 2 54.6 (77) 62.2 (180) 0.15 0.14
 3 33.3 (47) 17.4 (50) 0.37 < 0.001
 4 2.8 (4) 1.4 (4) 0.10 0.30
Comorbidity, % (n)
 Nil 8.5 (12) 21.7 (63) 0.38 < 0.001
 Yes, but no daily medication 5.0 (7) 11.4 (33) 0.24 0.03
 Yes, with daily medication 86.5 (122) 66.9 (194) 0.48 < 0.001
 Oxford Hip Score, mean (SD) 22.3 (9.2) 24.4 (8.6) 0.24 0.02
 EuroQol VAS, mean (SD) 71.4 (19.0) 73.5 (16.3) 0.12 0.24
 Other lower limb or back problems limiting mobility, % (n) 51.1 (72) 42.1 (122) 0.18 0.08
 Anterior surgical approach 33.8 (48) 31.0 (90) 0.06 0.56
 Paid employment, % (n) 31.2 (44) 44.1 (128) 0.27 0.01
  1. Abbreviations: BMI body mass index, ASA American Society of Anesthesiology, Education 1 = nil formal; 2 = Year 10 or less; 3 = Year 11 or 12; 4 = Degree or greater; Comorbidity included any conditions of the cardiovascular, renal, respiratory, endocrine, liver, central and peripheral nervous systems, and excluding other musculoskeletal conditions. Note: Standardized mean difference was calculated using the following equation - Standardized Mean Difference34 = (Mean1 – Mean 2)/√((SD1)2 + (SD2)2)/2