Development of a brief questionnaire to assess habitual beverage intake (BEVQ-15): sugar-sweetened beverages and total beverage energy intake.

INTRODUCTION

Energy-containing beverages, specifically sugar-sweetened beverages, may contribute to weight gain and obesity development. Yet, no rapid assessment tools are available which quantify habitual beverage intake (grams, energy) in adults.

OBJECTIVE

Determine the factorial validity of a newly developed beverage intake questionnaire (BEVQ) and identify potential to reduce items.

METHODS

Participants from varying economic and educational backgrounds (n=1,596, age 43±12 years, body mass index [calculated as kg/m(2)] 31.5±0.2) completed a 19-item BEVQ (BEVQ-19). Beverages that contributed <10% to total beverage, or sugar-sweetened beverages, energy and grams were identified for potential removal. Factor analyses identified beverage categories that could potentially be combined. Regression analyses compared BEVQ-19 outcomes with the reduced version's (BEVQ-15) variables. Inter-item reliability was assessed using Cronbach's α. Following BEVQ-15 development, a subsequent study (n=70, age 37±2 years; body mass index 24.5±0.4) evaluated the relative validity of the BEVQ-15 through comparison of three 24-hour dietary recalls' beverage intake.

RESULTS

Three beverage items were identified for elimination (vegetable juice, meal replacement drinks, and mixed alcoholic drinks); beer and light beer were combined into one category. Regression models using BEVQ-15 variables explained 91% to 99% of variance in the four major outcomes of the BEVQ-19 (all P<0.001). Cronbach's α ranged .97 to .99 for all outcomes. In the follow-up study, BEVQ-15 and three 24-hour dietary recalls' variables were significantly correlated with the exception of whole milk; BEVQ-15 sugar-sweetened beverages (R(2)=0.69), and total beverage energy (R(2)=0.59) were more highly correlated with three 24-hour dietary recalls' than previously reported for the BEVQ-19. The BEVQ-15 produced a lower readability score of 4.8, which is appropriate for individuals with a fourth-grade education or greater.

CONCLUSIONS

The BEVQ-19 can be reduced to a 15-item questionnaire. This brief dietary assessment tool will enable researchers and practitioners to rapidly (administration time of ∼2 minutes) assess habitual beverage intake, and to determine possible associations of beverage consumption with health-related outcomes, such as weight status.