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Table 1 Predetermined hypotheses for testing the validity of the Dutch version of WOSI: expected and observed correlations

From: Measurement properties of the Western Ontario Shoulder Instability Index in Dutch patients with shoulder instability

  Expected correlations Observed correlations
1. WOSI and OSIS ≥ 0.7 0.82
2. WOSI and SST ≥ -0.6 - 0.66
3. WOSI and OSS ≥ 0.6 0.79
4. WOSI and DASH ≥ 0.6 0.81
5. Correlation between WOSI and OSIS, both measuring a disease-specific construct should be at least 0.1 higher compared with all other correlations.
6. Correlation between similar WOSI and SF-36 domains should be higher compared with dissimilar domains.
7. Correlation between similar WOSI and SF-36 domains should be ≥ 0.4.
  1. Correlations were calculated using the total WOSI score.