Table 2

Modified Jadad scores (original Jadad criteria +6 additional criteria)

Jadad criteriaAdditional criteria
Study1234567abcdefJadadTotal
RandomisedDouble blindWithdrawals and dropoutsRandomisation (evaluation)Blinding (evaluation)Randomisation (evaluation)Blinding (evaluation)Control groupPreassessment and postassessmentBlinding (patients)Blinding (researchers)Standardised and reliable outcomePre–post correlationJadad scoresTotal scores
O’Moore et al79001000011001014
Lukse62000000001001103
Sarrel and DeCherney86000000010000001
Domar et al63000000001001103
Domar et al64001000001001013
Galletly et al82001000001001013
McQueeney et al80100110011101037
Tuschen-Caffier et al41001000011001014
Domar et al78 951111000111111410
Terzioglu91101000011001025
Hosaka et al87101100011001036
McNaughton-Casill et al96*101000011001025
Emery et al65101100011001036
Lee66100000011001014
De Klerk et al92101100011001036
Schmidt et al59001000011001014
Chan et al67101100011001137
Levitas et al88000000010000001
Nilforooshan et al58101000011001126
Tuil et al68101100011001036
Cousineau et al83101110011101048
Faramarzi et al61101000011001126
Lancastle and Boivin69101110011101048
Noorbala et al84*100110011001036
Mori70101110011101048
Panagopoulou et al71101010011101037
Haemmerli et al72101100011001036
Sexton et al85101100011001036
Domar et al89101110010010046
Hughes and de Silva73000000001001002
Chan et al94101100011001036
Gorayeb et al90101100010000034
Koszycki et al81101100011101037
Matthiesen et al74101110011101048
Mosalanejad et al75 76100000011001014
Mosalanejad et al75 76001000011001014
Catoire et al77*000000001011003
Galhardo et al97001000011001014
Vizheh et al93101110011011048
  • Criteria 1–7 in bold font are the original Jadad scores, a–f are the additional criteria. (1) Was the study described as randomised; (2) Was the study described as double blind; (3) Was there a description of withdrawals and dropouts; (4) The method of randomisation was described, and appropriate; (5) The method of blinding was described, and appropriate; (6) The method of randomisation was described, but inappropriate; (7) The method of blinding was described, but inappropriate; (a) The study included a control group; (b) The study included preassessment and postassessment; (c) There was an attempt of blinding or masking the active condition to patients; (d) There was an attempt of blinding the researchers; (e) The study used standardised and reliable outcome measures and (f) The study reported pre–post correlation.

  • *In these studies, the original Jadad score and the modified quality score relate to the methodological quality of the published study. For the purpose of the meta-analyses, some of the groups were collapsed or omitted, for example, if they compared two or more interventions or compared a psychological intervention with a medical treatment, thereby changing design status as shown in table 1.