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Table 1 Characteristics of patients and population controls

From: Health-related quality of life in patients waiting for major joint replacement. A comparison between patients and population controls

Characteristic Patients n = 133 Population controls n = 129–133 b Patients excluded n = 61–64 b P value c P value d
Age, years (mean ± SD) 67.6 (8.8) 67.6 (8.8) 66.0 (13.2) 1.000 0.375
Females [n, (%)] 83 (62.4) 81 (60.9) 43 (67.2) 0.801 0.513
Home municipality [n, (%)]     0.900 0.534
   Capital area 72 (54.1) 71 (53.4) 38 (59.4)   
   Other urban area 36 (27.1) 39 (29.3) 18 (28.1)   
   Rural area 25 (18.8) 23 (17.3) 8 (12.5)   
Housing, living alone [n, (%)] 39 (29.3) 40 (30.3) 29 (47.5) 0.862 0.014
Professional examination, yes [n, (%)] 45 (33.8) 61 (47.3) 23 (37.7) 0.027 0.600
Employment status [n, (%)]     0.229 0.066
   Employed 17 (12.8) 27 (20.3) 16 (26.2)   
   Retired 112 (84.2) 101 (75.9) 43 (70.5)   
   Other 4 (3.0) 5 (3.8) 2 (3.3)   
Comorbidity, yes [n, (%)] 89 (66.9) 98 (73.7) 48 (78.7) 0.227 0.095
BMIa (mean ± SD) 29.0 (4.4) 26.8 (4.4) 28.3 (4.7) <0.001 0.280
Waiting time, days [Md, range] 71 (8–600)     
Months waiting for surgery [n, (%)]      
   0–3 months 94 (70.7)     
   > 3–6 months 20 (15.0)     
   > 6 months 19 (14.3)     
  1. a BMI, body mass index (wt/ht2)
  2. b Number of observations varies due to missing values.
  3. c Between patients and population controls
  4. d Between the patients who completed the questionnaires (baseline and admission, n = 133) and those excluded (n = 64)