Table 2: Methodological quality.

Study Adequate randomization
Adequate allocationBlinding of assessorIntention to treat analysis

Babu et al. [34]NR1NRNRYes
Buckelew et al. [33]NRYesNRNo
Ferraccioli et al. [35] NoNRNRYes
Kayiran et al. [39] NRNRYesNR
Kravitz et al. [36]YesNRNRYes
Nelson et al. [38]NRYesNRNo
Van Tulder et al. [8]NRNRNRNo

Not reported.