A Trend for Increased Risk of Revision Surgery due to Deep Infection following Fast-Track Hip Arthroplasty

Table 1

Patient demographic and clinical characteristics ( = 4,406).

Characteristic	Men; = 1,246	Women; = 3,160	Statistics and effect sizes
Age in years ( = 4,403)	67.4 (10.8)	70.5 (10.0)	= 8.63, ; = 0.29
Range in years	26 to 92	24 to 94
Age group ( = 4,403)			, ; phi = 0.109
≤70 years ( = 2,195)	728 (58.5%)	1,467 (46.4%)
>70 years ( = 2,208)	516 (41.5%)	1,692 (53.6%)
Body mass index ( = 2,831)	26.9 (3.9)	25.9 (4.6)	, ;
Range	17.8 to 40.1	15.6 to 66.2
ASA score ( = 3,724)			= 26.3, ; phi = 0.084
() Healthy ()	188 (17.6%)	420 (15.9%)
() Mild disease ( = 2,543)	675 (63.0%)	1,868 (70.7%)
() Severe disease ( = 560)	207 (19.3%)	353 (13.4%)
() Life-threatening disease ( = 2)	1 (0.1%)	1 (0.0%)
Surgery duration (hrs : mins; ,713)	1 : 10 (0 : 19)	1 : 07 (0 : 17)	, ;
Length of hospital stay (days)	7.28 (2.81)	7.85 (3.34)	, ;
Range in days	1 to 27	1 to 95
Surgery type			, ; phi = 0.016
Standard THA ( = 4,167)	1,171 (94.0%)	2,996 (94.8%)
Fast-track THA ( = 239)	75 (6.0%)	164 (5.2%)
Prosthesis type			, ; phi = 0.096
Cemented ( = 2,368)	575 (46.1%)	1,793 (56.7%)
Uncemented ( = 2,038)	671 (53.9%)	1,367 (43.3%)

Note. THA: total hip arthroplasty. While many of the gender differences are statistically significant, the effect sizes are small.
Separate variance -test.
Body mass index was not routinely recorded prior to January 2007, and ASA classification and surgery duration were not routinely recorded prior to April 2004, and thus reduced sample sizes were available for these variables. ASA scores () and () were combined for analysis.