Table 2.

Score distributions, floor and ceiling effects, internal consistency, and test-retest reliability of the VITACORA-19 questionnaire.

VITACORA–19Global Score
Items, n19
Mean55.7
SD24.6
Theoretical range0–100
Observed range10.5–100
Floor*, %0
Ceiling†, %1
Cronbach’s alpha0.95
ICC‡0.94

  • ↵* Percentage of patients with the worst possible score.

  • ↵† Percentage of patients with the best possible score.

  • ↵‡ Stability assessed by patient; subgroup of stable patients, n = 97. VITACORA-19: PsA quality of life questionnaire; ICC: interclass correlation coefficient.