Fig 1.
Flow diagram of studies selection process.
Table 1.
UAS versus non-UAS: Summary of selected studies.
Table 2.
Characteristics of selected studies.
Fig 2.
a SFR, b SFR with sensitivity analysis, c intraoperative complications, d postoperative complications, e operative time, f hospitalization time. UAS: ureteral access sheath; non-UAS: without an ureteral access sheath.
Table 3.
Subgroup analysis.