Case Control Study
Copyright ©The Author(s) 2017.
World J Orthop. Dec 18, 2017; 8(12): 895-901
Published online Dec 18, 2017. doi: 10.5312/wjo.v8.i12.895
Table 3 Incidence of periprosthetic infections at 90 d following total hip arthroplasty
LocationSpringSummerFallWinterχ2
North East0.82%0.83%0.84%0.91%0.358
Mid West0.97%0.97%0.88%1.04%0.013
South1.06%1.06%0.96%1.10%0.007
West0.84%0.84%0.88%0.89%0.68
Mean0.92%0.92%0.89%0.98%
SD0.11%0.11%0.05%0.10%