Assessing alcohol consumption: beverage-specific versus grouped-beverage questions.
OBJECTIVE
The quantity-frequency method is commonly used to measure alcohol intake in large surveys. Because of time and space constraints, questionnaires are often shortened by combining questions on all types of alcohol into a single question. We investigated the effect of this practice using data from the Behavioral Risk Factor Surveillance System.


METHODS
We examined data collected from 213,842 respondents to surveys conducted by 32 states and the District of Columbia participating in the years 1987, 1988, 1989 and 1990. The 1987 and 1988 surveys asked questions about respondents' frequency and level of intake of specific alcohol-containing beverages. The 1989 and 1990 surveys asked about the frequency and quantity of intake of alcohol-containing beverages by combining all beverages into a single group.


RESULTS
Among drinkers, the mean number of drinks per month was higher for those who were asked beverage-specific questions than for those who were asked grouped-beverage questions (men: 37.0 vs 29.6; women: 17.0 vs 13.9).


CONCLUSIONS
Caution must be used in comparing level of alcohol intake from surveys in which beverages are not grouped identically.
Serdula
M K
MK
Chronic Disease Prevention Branch, Division of Nutrition and Physical Activity, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia 30341-3724, USA.
Mokdad
A H
AH
Byers
T
T
Siegel
P Z
PZ
D000328:Adult; D000368:Aged; D000428:Alcohol Drinking / Q000453:epidemiology*; D000434:Alcoholic Beverages / Q000145:classification*; D016208:Databases, Factual / Q000592:standards; D004219:District of Columbia / Q000453:epidemiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D011795:Surveys and Questionnaires / Q000592:standards*; D009626:Terminology as Topic