Psychometric evaluation of the German Day-to-Day Impact of Vaginal Aging questionnaire using data from two intervention studies.

OBJECTIVE

We aimed to further validate the German version of the Day-to-Day Impact of Vaginal Aging (DIVA) questionnaire.

METHODS

Data were collected in the context of two intervention studies. Forty-two women participated in clinical trial VMP-03/2018 (NCT04222647) and 79 women in clinical trial VFCrC-01/2021 (NCT05211505). Internal consistency was calculated using Cronbach α . Correlations with other outcome measures such as a subjective assessment of symptoms and dyspareunia, the Vaginal Health Index, and the Vaginal Maturation Index were calculated regarding construct validity. A priori hypotheses were formulated for construct validity. Responsiveness was assessed after 43 (±3) and after 38 (±1) days in the two clinical trials.

RESULTS

Strong internal consistency in all of the DIVA domains was found ( α ≥ 0.80). Regarding construct validity (at baseline and over time), many hypotheses were confirmed. Furthermore, all of the DIVA domains were able to detect changes over time ( P ≤ 0.006). Moderate to strong effect sizes were found (≥0.460). The data supported the responsiveness of the DIVA.

CONCLUSIONS

Our findings from two independent intervention studies support internal consistency, construct validity, and responsiveness of the German version of the DIVA (domains).