Psychometric Properties of Scales for Psychological Variables Based on the Transtheoretical Model among Smokers
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Abstract
Objective: To investigate validity and reliability of the measuring scales for psychological variables based on the transtheoretical model among smokers. Method: The study measured the stages of change, the decision balance and smoking temptation using the scales by Velicer et al. The processes of change was assessed by the scale by Prochaska et al. All measures were translated and back translated from English to Thai. The data were collected from 330 convenient samples of smokers and ex-smokers comprising of privates in a military fort in a southern province, military officers seeking an annual health check-up and non-military male outpatients in a hospital affiliated with the Fort. Results: Proportions of smokers in precontemplation, contemplation and preparation stages were 50.00, 32.14 and 17.86, respectively. The decision balance scale showed satisfactory validity and reliability similar to those reported in the previous studies on the original scale. The temptation scale measured two dimensions i.e., temptation from craving and positive affect situations and temptation from negative affect situations. The two subscales exhibited an acceptable level of validity and reliability. Factor analytic results of 10 scales for processes of change revealed that the items of four processes clustered in the patterns consistent to those reported in the previous study of the original scale. Conclusion: Thai scales for stage of change, decision balance and smoking temptation exhibits a satisfactory level of validity and reliability. They could be useful for gathering the information on the corresponding variables among the smokers in the effort to help them quit smoking. However, the process of change scale needs a major revision before it could be recommended for widespread use.
Article Details
ผลการวิจัยและความคิดเห็นที่ปรากฏในบทความถือเป็นความคิดเห็นและอยู่ในความรับผิดชอบของผู้นิพนธ์ มิใช่ความเห็นหรือความรับผิดชอบของกองบรรณาธิการ หรือคณะเภสัชศาสตร์ มหาวิทยาลัยสงขลานครินทร์ ทั้งนี้ไม่รวมความผิดพลาดอันเกิดจากการพิมพ์ บทความที่ได้รับการเผยแพร่โดยวารสารเภสัชกรรมไทยถือเป็นสิทธิ์ของวารสารฯ
References
2) World Health Organization. Tobacco Control Country Profiles [online]. 2003 [cited 2008 Jul 15]. Available from URL: http://www.who.int/tobacco/global_data /country_profiles/en/index.html
3) ศรัณญา เบญจกุล, มณฑา เก่งการพานิช, ลักขณา เติมศิริกุลชัย, ณัฐพล เทศขยัน. สถานการณ์การบริโภคยาสูบของประชากรไทย พ.ศ. 2543-2549. กรุงเทพฯ: เจริญดีมั่นคงการพิมพ์; 2550.
4) Hughes JR. Combined psychological and nicotine gum treatment for smoking: a critical review. J Substance Abuse 1993;3:337–50.
5) Nelson E. The miseries of passive smoking. Hum Exp Toxicol 2001;20:61-83.
6) สมหญิง พุ่มทอง. ยาและการเข้าถึงยาเพื่อการเลิกบุหรี่ในประเทศไทย. ไทยเภสัชศาสตร์และวิทยาการสุขภาพ 2551; 3:303-8.
7) Curry SJ. Self-help interventions for smoking cessation. J Consult Clin Psychol 1993; 61:790–803.
8) Schmid TL, Jeffrey RW, Hellerstedt WL. Direct mail recruitment to house-based smoking and weight control programs: a comparison of strengths. Prev Med 1989;18:503–17.
9) Fiore MC, Bailey WC, Cohen SJ, Dorfman S, Goldstein M, Gritz E, et al. Smoking cessation clinical practice guideline No. 18. Rockville (MD): US. Department of Health and Human Services, Agency for Health Care Policy and Research; 1996 Apr. Publication No. 96-0692.
10) The COMMIT Research Group. Community intervention trial for smoking cessation (COMMIT): II Changes in adult cigarette smoking prevalence. Am J Public Health 1995; 85:193–200.
11) Glasgow RE, Terborg JR, Hollis JF, Severson HH, Boles SM. Take heart: results from the initial phase of a work-site wellness program. Am J Public Health 1995; 85:209–16.
12) Velicer WF, Fava JL, Prochaska JO, Abrams DB, Emmons KM, Pierce J. Distribution of smokers by stage in three representative samples. Prev Med 1995; 24:401–11.
13) Prochaska JO, DiClemente CC.. Stages and processes of self-change of smoking: toward an integrative model of change. J Consult Clin Psychol 1983;51:390–5.
14) Velicer WF, Prochaska JO. An expert system intervention for smoking cessation. Patient Educ Couns 1999;36:119–29.
15) Velicer WF, Prochaska JO, Fava JL, Norman GJ, Redding CA. Smoking cessation and stress management: Applications of the Transtheoretical Model of behavior change. Homeostasis 1998;38: 216-33.
16) Prochaska JO. Strong and weak principles for progressing from precontemplation to action on the basis of twelve problem behaviors. Health Psychol 1994;13:47-51.
17) Prochaska JO, Velicer WF, DiClemente CC, Fava JL. Measuring the processes of change: applications to the cessation of smoking. J Consult Clin Psychol 1988;56:520–8.
18) Velicer WF, DiClemente CC, Prochaska JO, Brandenberg N. A decisional balance measure for assessing and predicting smoking status. J Pers Soc Psychol 1985;48:1279-89.
19) Velicer WF, DiClemente CC, Rossi JS, Prochaska JO. Relapse situations and self-efficacy: An integrative model. Addict Behav 1990;15:271-83.
20) Guillemin F, Bombardier C, Beaton D. Cross-cultural adaptation of health-related quality of life measures: literature review and proposed guidelines. J Clin Epidemiol 1993;46:1417–32.
21) Bowen CW. Think-aloud method in chemistry education. J Chem Educ 1994;71:184-90.
22) MacCallum RC, Widaman KF, Zhang S, Hong S. Sample size in factor analysis. Psychol Methods 1999;4:84-99.
23) Centers for Disease Control and Prevention. Cigarette smoking among adults-United States, 1993. MMWR Morb Mortal Wkly Rep 1994;43:925-9.
24) Nunnally JC. Psychometric theory. 2nd ed. New York: McGraw-Hill; 1978.
25) Etter JF, Perneger T V, Ronchi A. Distributions of smokers by stage: International comparison and association with smoking prevalence. Prev Med 1997;26:580-5
