Table 1.
Cut-offs for strength of agreement.
Fig 1.
Flow diagram of literature searches and search results.
Table 2.
Characteristics of included studies.
Table 3.
QUADAS-2 risk of bias assessment of included studies reporting validity.
Fig 2.
Proportion of studies assessed as low, high, or unclear risk of bias and applicability.
Table 4.
QAREL risk of bias assessment of included studies reporting reliability.
Table 5.
Summary of findings and GRADE assessment.
Table 6.
Mean values of reported patient satisfaction (VAS 0–100).