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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.