Studies are grouped alphabetically by screening instrument and ordered by increasing number of participants. The area of each square is proportional to the inverse variance of the estimate. Error bars indicate 95% confidence intervals of the estimate. CY, cynicism; DP, depersonalization; EE, emotional exhaustion; EX, exhaustion; HBI, Hamburg Burnout Inventory; MBI, Maslach Burnout Inventory; MBI-GS, MBI–General Survey; MBI-HSS, MBI–Human Services Survey; Mini Z, Zero Burnout Program Survey; PA, personal accomplishment; PE, professional efficacy; UBOS, Utrechtse Burnout Schaal (Dutch adaptation of the MBI).