Table 3 Results of the linear difference model for scenario 1

Number of reviewers during data extraction

1.611 [1.306; 1.987]

< 0.0001

Number of reviewers during screening

1.484 [1.245; 1.770]

< 0.0001

Full-text analysis

1.475 [1.165; 1.869]

0.0013

Publication period to be considered

1.382 [1.099; 1.737]

0.0056

Types of HTA domains

1.225 [1.046; 1.434]

0.0117

Number of databases

1.022 [0.816; 1.281]

0.8469