Medical expulsive therapy in urolithiasis: a mixed treatment comparison network meta-analysis of randomized controlled clinical trials
Abstract
BACKGROUND: Medical expulsive therapy (MET) using alpha blockers, calcium channel blockers (CCB), phosphodiesterase inhibitors (PDEI) and spasmolytics have been shown to be effective in clinical trials on urolithiasis. The present study is a network meta-analysis comparing the above mentioned drug classes.
RESEARCH DESIGN AND METHODS: Electronic databases were searched for randomized controlled trials comparing the above mentioned drug classes in patients with urolithiasis using appropriate search strategy. Inverse variance heterogeneity model was used for the mixed treatment comparisons. Stone expulsion rate (SER) was the primary and stone expulsion time (SET) was the main secondary outcome measure.
RESULTS: We included a total of 114 studies for systematic review and 108 studies for the network meta-analysis. Alpha blockers, PDEI, and combined alpha blockers and corticosteroids had significantly increased SER and shorter SET than placebo or standard of care. Alpha blockers have the highest probability of being the 'best' in the pool with regard to SER. This effect persisted in patients with stones ≥ 5 mm, children, after shockwave lithotripsy, proximal ureteric stones and distal ureteric stones.
CONCLUSION: To conclude, we observed a statistically significant increase in the expulsion rate and shorter expulsion time with alpha blockers, PDEI and combined alpha blockers with corticosteroids. Of these interventions, alpha blockers have the high probability of being the…
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