Smoking status by proxy and self report: rate of agreement in different ethnic groups
Ana M Navarro
Department of Family
and Preventive Medicine, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0622, USA;
anavarro{at}ucsd.edu
Received 11 March 1998 and in revised form 23 December 1998;
Accepted 24 January
1999.
OBJECTIVE
To examine
the rate of agreement between proxy and self report of smoking status
in Hispanics compared with other ethnic groups.
DESIGNData source is
the 1990 California Tobacco Survey (CTS) which includes proxy and self
reported smoking status. The CTS is a random digit dialled survey
conducted in 57 244 households. A sample of 10 011 adults was
included in the analyses.
MAIN OUTCOME
MEASUREPercentages of agreement and disagreement
between self report and report by other member of the household on
smoking status.
RESULTSCohen's 
coefficients of agreement on smoking status between self report and
proxy report was highest in non-Hispanic whites and African Americans
( = 0.91), followed by Asian Americans ( = 0.82 ) and Hispanics
( = 0.76). Among adults identified as current smokers by proxy, a
lower percentage of Hispanics compared with non-Hispanics indicated
that they were current smokers (odds ratio (OR) = 3.74, 95%
confidence intervals (CI) = 3.28 to 4.20). Furthermore, agreement
between proxy and self report was also lower in Hispanics of low
acculturation compared with Hispanics with a high level of
acculturation (OR = 0.40, 95% CI = 0 to 0.94).
CONCLUSIONSThe
agreement between self reported and proxy reported smoking status is
higher among non-Hispanics compared with Hispanics. Smoking rates in
different ethnic groups that are estimated by telephone surveys
including proxy and self report might not be comparable.
Keywords: smoking status; Hispanics; self reporting
© 1999 by Tobacco Control
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