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DHQ Alcohol

Purpose

Alcohol use by trial participants is summarized in a set of variables that are available for researchers in the DHQ Alcohol dataset. These same variables are also included in the Diet History Questionnaire Dataset with over 900 other diet variables.

Data Collected

The Diet History Questionnaire (DHQ) asked participants to answer current and historical alcohol consumption of beer, wine and liquor. The current alcohol frequency/amount was collected for beer (Q8), wine (Q9) and liquor/mixed drinks (Q10) as a standard component of the DHQ. Historical data on the frequency/amount of alcohol consumption was collected for the following age groupings: 18-24, 25-39 40-54, 55+ (Q156). Data from their responses was cleaned to address inconsistencies.

Population

The DHQ covers nearly 119,000 participants and was completed a median time of 3 years after randomization. It was introduced 5yrs into the trial and was administered at different times for participants in the intervention arm vs. participants in the control arm. See https://cdas.cancer.gov/learn/plco/early-qx/dhq/ for more details on the DHQ.

Drinking Status and Lifetime Data Available

Drinking status at the DHQ was calculated to identify current/former/never using both the current and historical data. Lifetime alcohol consumption (mped_alc_bev_lifetime_dhq), which represents the average MPEDs of alcohol (drinks/day) from age 18 to DHQ completion, was derived for more than 110,000 participants.