Table 1

Study quality

/1/3/3/2/4/1/5/1/20
AuthorObjectiveStudy designStudy populationInterventionOutcomesStatisticsResults/conclusionsCompeting interest/supportTotal
Skarda et al11031313012
Watson et al51131414015
Fortenberry et al81031313012
Steiner et al4100131208
  • A score of >14 indicates a study of adequate quality.