2.5. Data analysis and statistical methods
This protocol is extracted from research article:
Indwelling catheter increases the risk of urinary tract infection in total knee arthroplasty
Medicine (Baltimore), Apr 16, 2021; DOI: 10.1097/MD.0000000000025490

The current meta-analysis was calculated using Review Manager Software Windows 5.3 (Cochrane Collaboration, Oxford, UK). For continuous outcomes, the mean difference (MD) with 95% confidence intervals (CIs) was used. For discontinuous outcomes, relative risk (RR) with 95% CIs was used. The statistical heterogeneity was assessed by the value of P and I2 using the chi-square test. If the I2 > 50% or P < .05 were considered to demonstrate significant heterogeneity and the random-effect model was chosen, otherwise the fixed-effect model was chosen. This meta-analysis also used a funnel plot of urinary tract infection to independently assess publication bias.

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