Nine studies were included. Total sample size appeared to be 690 patients (range 20 to 176).
Overall, the review reported no statistically significant difference between arms in 100 point scores (mean difference 0.34, 95% CI -0.86 to 1.54; slightly favouring arthroscopic surgery; based on seven studies), patient satisfaction rates (mean difference -3.0%, 95% CI -7.7% to 1.7%; slightly favouring open surgery; based on seven studies) and complication rates (mean difference -1.0%, 95% CI -4.0% to 3.0%; slightly favouring open surgery; based on five studies). There were statistically significant differences in hospital stay duration (average 2.3 days shorter in arthroscopic group, 95% CI -2.5 to -2.0 days; based on five studies) and time until return-to-work (average 12.1 days shorter in arthroscopic group, 95% CI -13.9 to -10.3 days; based on five studies). The arthroscopic group had statistically significant but clinically insignificant reduction in operation room time (2.2 minutes less, 95% CI -3.8 to -0.6 minutes; based on four studies).