Predicting Outcome after Total Hip Arthroplasty: The Role of Preoperative Patient-Reported Measures

Table 1

Anthropometric and operative characteristics of the study group classified in responder grade one year after THA.

N=126	Responders	Non-Responders^#
Age (years)	61.6 ± 7.4	64.2 ± 8.2
Gender (men/women)	51/52	12/11
BMI (kg/m2)	27.0 ± 4.1	26.6 ± 3.5
Treatment side (left/right)	48/55	11/12
ASA Class 1	18 (17.5%)	7 (30.4%)
ASA Class 2	53 (51.5%)	12 (52.2%)
ASA Class 3	32 (31.1%)	4 (17.4%)
Kellgren–Lawrence score	9 (5–10)	8 (7–9)
Length of skin incision (cm)	10.4 ± 1.2	10.2 ± 1.4
Operative time (minutes)	68.7 ± 14.7	66.3 ± 13.7

For categorical data, values are given as relative and absolute frequencies; for quantitative data, values are given as mean (standard deviation) or median (range). # Responders and nonresponders were defined according to the modified OMERACT-OARSI criteria. THA: total hip arthroplasty, BMI: body mass index, ASA: American Society of Anaesthesiologists.