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Table 2 Characteristics of responders to Mayo Hip Questionnaire (pain and functional limitation) for primary THA

From: Patients with osteoarthritis and avascular necrosis have better functional outcomes and those with avascular necrosis worse pain outcomes compared to rheumatoid arthritis after primary hip arthroplasty: a cohort study

  Two years Five years
Variable Events for responders Odds ratio (95% CI) P-value Events for responders Odds ratio (95% CI) P-value
Gender       
 Female 1976/4736 (41.7%)    1244/3281 (37.9%)   
 Male 1847/4418 (41.8%) 1.0 (0.9 to 1.1) 0.94 1130/2962 (38.1%) 1.0 (0.9 to 1.1) 0.85
Age Category       
 < 60 1176/2988 (39.4%)    737/2075 (35.5%)   
 61 to 70 1204/2676 (45%) 1.3 (1.1 to 1.4) <0.01 791/1893 (41.8%) 1.3 (1.1 to 1.5) <.01
 71 to 80 1121/2706 (41.4%) 1.1 (1.0 to 1.2) 0.12 706/1841 (38.3%) 1.1 (1.0 to 1.3) 0.08
 >80 322/784 (41.1%) 1.1 (0.9 to 1.3) 0.40 140/434 (32.3%) 0.9 (0.7 to 1.1) 0.20
BMI Category       
 <25 935/2221 (42.1%)    571/1570 (36.4%)   
 25 to 29.9 1493/3477 (42.9%) 1.0 (0.9 to 1.2) 0.54 954/2393 (39.9%) 1.2 (1.0 to 1.3) 0.03
 30 to 34.9 907/2209 (41.1%) 1.0 (0.8 to 1.1) 0.49 548/1479 (37.1%) 1.0 (0.9 to 1.2) 0.70
 35 to 39.9 309/786 (39.3%) 0.9 (0.8 to 1.1) 0.19 187/515 (36.3%) 1.0 (0.8 to 1.2) 0.98
 >40 161/419 (38.4%) 0.9 (0.7 to 1.1) 0.17 102/259 (39.4%) 1.1 (0.9 to 1.5) 0.38
ASA Score       
 1 to 2 2410/5608 (43%)    1539/3950 (39%)   
 3 to 4 1396/3509 (39.8%) 0.9 (0.8 to 1.0) <0.01 823/2261 (36.4%) 0.9 (0.8 to 1.0) 0.05
Charlson Index (5 point increase) N/A 0.8 (0.7 to 0.9)   N/A 0.9 (0.7 to 1.0) 0.05
Distance Category       
 0 to 100 miles 1785/4145 (43.1%)    1093/2743 (39.8%)   
 >100 to 500 miles 1531/3695 (41.4%) 0.9 (0.9 to 1.0) 0.16 935/2520 (37.1%) 0.9 (0.8 to 1.0) 0.05
 >500 miles or non-US 381/988 (38.6%) 0.8 (0.7 to 1.0) 0.01 220/675 (32.6%) 0.7 (0.6 to 0.9) <0.01
Operative Diagnosis       
 Inflammatory arthritis 94/251 (37.5%)    71/205 (34.6%)   
 AVN 257/687 (37.4%) 1.0 (0.7 to 1.4) 0.99 176/519 (33.9%) 1.0 (0.7 to 1.4) 0.86
 Osteoarthritis 3355/7825 (42.9%) 1.3 (1.0 to 1.6) 0.10 2030/5218 (38.9%) 1.2 (0.9 to 1.6) 0.23
 Other 117/391 (29.9%) 0.7 (0.5 to 1.0) 0.05 97/301 (32.2%) 0.9 (0.6 to 1.3) 0.59
  1. ASA, American Society of Anesthesiologists; AVN, avascular necrosis of bone; BMI, body mass index; CI, confidence interval; THA, total hip arthroplasty.