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Table 1 Demographic details of the patients

From: One-staged combined hip and knee arthroplasty: retrospective comparative study at mid-term follow-up

Demographic details of the patients
  Group A Group B P
 Sex (male:female) 11:10 09:12 0.5
 Age at surgery (years) 69.4 ± 7.9 70.1 ± 10.2 0.6
 BMI (kg/m2) 26.9 ± 3,9 28,2 ± 4.6 0.07
 Mean follow-up (months) 42.8 ± 15.6 53.6 ± 12.5 0.06
 Preoperative Hgb (g/dl) 14.2 ± 1.2 13.7 ± 1.2 0.6
Preoperative diagnosis
 Primary OA 18 (85.7%) 19 (90.5%) 0.9
 Rheumatoid arthritis 2 (9.5%) 2 (9.5%) 0.9
 Revision hip arthroplasty 1 (4.8%) 0 n.a.
 Revision knee arthroplasty 0 0 n.a.
Surgical procedure
 Ipsilateral 14 (66.6%) 10 (47.6%) 0.9
 Contralateral 7 (33.4%) 11 (52.4%) 0.8
ASA score
 ASA 2 20 (95.2%) 19 (90.5%) 0.9
 ASA 3 1 (4.8%) 2 (9.5%) n.a.
Type of knee arthroplasty
 Medial UKA 12 (57.1%) 12 (57.1%) 0.9
 Bi-UKA 1 (4.8%) 0 n.a.
 PFJ arthroplasty 2 (9.5%) 1 (4.8%) n.a.
 TKA 6 (28.6%) 8 (38.1%) 0.9
  1. Results reported as mean value + standard deviation
  2. P results of Mann-Whitney U test or χ2 test, BMI body mass index, Hgb haemoglobin, OA osteoarthritis, ASA American Society of Anesthesiology, UKA unicompartmental knee arthroplasty, PFJ patellofemoral joint, TKA total knee arthroplasty, n.a. not applicable