Figure 2From: Using the bootstrap to establish statistical significance for relative validity comparisons among patient-reported outcome measures Bootstrap confidence interval for the RV of SF-12 RP by sample size, denominator F-statistic, and correlation. The vertical bars present the confidence intervals with upper and lower bounds. The dots on the vertical bars represent the point estimates of RVs. Abbreviations: RV, relative validity; SF-12, Short Form 12; RP, role physical.Back to article page