Table 1.
Definitions of (a) reporting and (b) design characteristics.
Fig 1.
Proportion of validation studies with adequate and inadequate description of reporting characteristics.
Fig 2.
Evolution of methodological quality over time.
Proportion of validation studies satisfying (a) reporting characteristics and (b) design characteristics recommended in methodological standards.
Fig 3.
Influence of design characteristics on the performance of clinical prediction rule in multivariable analysis.
Fig 4.
Applying the sensitivity and specificity of (a) 90% as presented in the validation study [58] and (b) 81% from an unbiased study to a patient with 10% probability of rheumatoid arthritis.