This intervention uses questionnaire at three-time intervals (i.e., days 5, 10, and 30) and abstraction of PAP use data (days 1 - 35). Consecutive adults with moderate-severe OSA and recommended to PAP treatment will be invited to the study. Once the patient has been prescribed PAP therapy a research associate will call the patient before receiving their new PAP device. The research associate will utilize an IRB approved telephone script to discuss study details, conduct eligibility screening (inclusion/exclusion criteria), and to ask whether the patient is interested in participating.

The research associate will then send the patient an IRB approved digital information sheet. The information sheet will provide the patient an option to mark "Yes" if they are willing to participate in the study or "No" if they are not willing. Patients who indicate their willingness to participate will receive the Triage Tool in accordance with the study protocol.

Investigate the factor structure of the TT, an exploratory factor analysis (EFA) will be conducted. A forced six-factor EFA using a varimax rotation will be conducted to determine the factor loadings on six sub-scales and to determine whether the EFA factors are similar to the theoretically derived categories from the original TT instrument. Data from the TT collected at day 5 will be used for the factor analysis as we expect higher response rate at this first data collection endpo

Concurrent validity will assess the extent to which TT scores are related to concurrent PAP use. This will be established based on Pearson product moment correlation coefficients (for continuous PAP use [hours/night]) and Point Biserial correlations (for PAP non-adherence, defined as <4 hours/night of use, on average) at three intervals: day 5 (PAP use on days 1-5), day 10 (PAP use on days 6-10), and day 30 (PAP use on days 11-30).

To determine the TT accuracy for predicting PAP non-adherence (defined as <4 hours/night of use, on average) receiver operating characteristic (ROC) curves and respective area under the curve (AUC) with 95% confidence interval (CI) will be estimated using PAP TT subdomain scores as predictors for PAP non-adherence within 5 days post-TT score data collection. As TT data will be collected at 3 intervals (i.e., days 5, 10, and 30) and considering the 6 subdomains from the TT scale, a total of 18 ROCs/AUCs will be estimated.

Unadjusted, descriptive analysis will be conducted to explore acute changes in PAP use immediately after intervention delivery. Change in PAP use will be assessed by computing the difference (delta) in PAP use (mean, hours/night) for the 5 consecutive days pre- and post-VE. Positive delta values will indicate greater PAP use post-intervention delivery.