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Can Fam Physician
Vol. 54, No. 1, January 2008, pp.76 - 77
Copyright © 2008 by The College of Family Physicians of Canada
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Testing the Simple Lifestyle Indicator Questionnaire

Initial psychometric study

Marshall Godwin, MSc MD FCFP
Professor and Director of the Centre for Studies in Primary Care at Queen’s University in Kingston, Ont, at the time of this study and is now a Professor and Director of the Primary Healthcare Research Unit at Memorial University of Newfoundland in St John’s

Susan Streight and Elena Dyachuk, MD
Research Assistants at the Centre for Studies in Primary Care

E. Caroline van den Hooven, MSc and Janneke Ploemacher, MSc
Research Interns at the Centre for Studies in Primary Care and are on an international elective from Wageningen University in the Netherlands

Rachelle Seguin, MA MPA
Research Manager at the Centre for Studies in Primary Care

Sharon Cuthbertson, RD MSc
Nutritionist in the Department of Family Medicine at Queen’s University

Correspondence to: Dr Marshall Godwin, Primary Health Care Research Unit, Room 1776, Health Science Centre, 300 Prince Phillip Dr, St John’s, NL A1B 3V6; telephone 709 777-8373; fax 709 777-6118; e-mailgodwinm{at}mun.ca

OBJECTIVE To carry out initial psychometric testing on the Simple Lifestyle Indicator Questionnaire (SLIQ).

DESIGN Self-administered questionnaire to obtain data for test-retest reliability, for Cronbach {alpha} testing on completed questionnaires, and for blinded external validity testing.

SETTING Kingston, Ont, and surrounding area.

PARTICIPANTS One hundred thirty-six family practice patients with an mean age of 68 years; 58% were women. Subjects were primarily white and living in a small city and itsrural surroundings.

MAIN OUTCOME MEASURES Test-retest coefficients, Cronbach {alpha} values, and correlation coefficients.

RESULTS Test-retest reliability on the 12 questions ranged from 0.63 to 0.97. The Cronbach {alpha} was 0.58 for questions on diet and 0.6 for questions on physical activity. We found a correlation coefficient of 0.77 between participants’ and blinded raters’ scores on the SLIQ.

CONCLUSION The SLIQ, as currently tested, is likely suitable for use in research on people who are at least similar to those in our study population. It probably should not be used in clinical settings until further testing has been carried out.






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