Table 2

 Search strings used for studies where direct and indirect utilities were compared in the same population

SearchDirect terms usedIndirect terms usedTotal number of hitsHits that fulfilled criteria
1Standard gamble or SGEuroQol or EQ-5D or EQ5D5815
2Time trade off or TTOEuroQol or EQ-5D or EQ5D9118
3Standard gamble or SGShort Form or SF-6D or SF6D883
4Time trade off or TTOShort Form or SF-6D or SF6D525
5Standard gamble or SGHealth utilities index or HUI1169
6Time trade off or TTOHealth utilities index or HUI468