Table 3

Modified Oxford Scale. Validity score (0 to 7)

Randomisation

     0 None

     1 Mentioned

     2 Described and adequate



Concealment of allocation

     0 None

     1 Yes



Double blinding

     0 None

     1 Mentioned

     2 Described and adequate



Flow of patients

     0 None

     1 Described but incomplete

     2 Described and adequate


Garcia-Campayo et al. Arthritis Research & Therapy 2008 10:R81   doi:10.1186/ar2455