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Table 1 Demographic characteristics of included cases

From: Complications of primary total hip arthroplasty among patients with rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, and primary osteoarthritis

Characteristic

Rheumatoid Arthritis (%)

Psoriatic Arthritis (%)

Ankylosing Spondylitis (%)

Primary Osteoarthritis (%)

P-value

Incidence rate

2.90

0.16

0.16

85.94

–

Female

12,868(74.87)

490(50.94)

248(26.38)

282,952(55.68)

< 0.0001

Age group

< 0.0001

  ≤ 65

8670(50.43)

657(68.3)

661(70.24)

248,426(48.81)

 65–80

6667(38.78)

265(27.55)

232(24.65)

198,216(38.94)

  ≥ 80

1856(10.8)

40(4.16)

48(5.1)

62,344(12.25)

 

 obesity

2263(13.16)

174(18.09)

99(10.52)

75,261(14.77)

< 0.0001

Elective admission

15,299(89.11)

899(93.45)

879(93.61)

479,874(94.39)

< 0.0001

Comorbidity

4.0734

2.986

3.606

3.174

< 0.0001