Article Figures & Tables
Tables
- Table 1
Clinical and Significant Demographic Variables Related to Waiting Time for 553 Patients Scheduled for Major Joint Arthroplasty Between December 1995 and January 1997 at Two Referral Hospitals in the Capital Health Region, Edmonton
Variable Patients, no. (and %) Mean (and SD) waiting time, d (univariate comparison) B* (multivariate comparison) Marital status Unmarried 202 (37) 108.9 (92.6) Comparison Married 351 (63) 105.4 (88.5) −1.18† Primary language English or French 431 (78) 110.5 (91.5) Comparison Other 122 (22) 93.2 (83.3)† −1.24† Affected joint Hip 304 (55) 111.2 (90.3) Comparison Knee 249 (45) 101.1 (89.3) 1.15 Diagnosis Rheumatoid arthritis 31 (6) 89.4 (83.1) Comparison Osteoarthritis 487 (94) 105.3 (85.9) −1.33 Body mass index ≤ 26 197 (39) 97.6 (88.9) Comparison 27–32 199 (39) 109.8 (90.5) 1.14 > 32 105 (21) 121.9 (90.5)† 1.27† Comorbid conditions ≤ 2 195 (35) 107.7 (96.1) Comparison 3 – 4 214 (38) 110.4 (92.9) 1.11 > 4 144 (26) 99.6 (75.9) −1.03 Medication Quantification Score 0 94 (17) 102.3 (85.8) Comparison 1–3 161 (29) 109.6 (95.1) 1.25 4–6 167 (30) 109.1 (91.5) 1.28† ≥ 7 131 (24) 103.1 (84.9) 1.16 Walking aids Yes 369 (67) 103.0 (85.0) Comparison No 184 (33) 114.0 (99.0) −1.03 WOMAC pain Mild 45 (8) 124.1 (102.3) Comparison Moderate 360 (67) 107.6 (90.2) −1.04 Severe 135 (25) 100.7 (83.0) −1.22 WOMAC stiffness Mild 53 (10) 124.8 (101.8) Comparison Moderate 299 (54) 106.0 (88.5) −1.22 Severe 201 (36) 103.6 (86.8) −1.16 WOMAC function Good 39 (8) 137.8 (103.4)† Comparison Fair 310 (62) 108.3 (92.6) −1.03 Poor 154 (31) 97.4 (74.8) 1.05 Surgeon’s practice ≥ 25 arthroplasties/yr 525 (95) 109.6 (90.3) Comparison < 25 arthroplasties/yr 28 (5) 53.9 (42.3)‡ −1.85‡§ WOMAC = Western Ontario and McMaster Universities.
↵* Exponentiation of the coefficient
↵† p < 0.05
↵‡ p < 0.001
↵§ Persons seen by surgeons who performed less than 25 major arthroplasties per year waited on average .54 times as long (less time) for their surgery, in comparison with patients seen by surgeons who performed more than 25 major arthroplasties per year.
For negative coefficients only, use the reciprocal for interpretation (i.e 1/1.85 = 0.54).