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The objective of this research was to obtain, in a structural equation model, the factorial validity of smoking-related self-efficacy, as well as its structural association with behavior and smoking intention. The sample was made up of 1012 young people aged 14 to 22 (mean 16.76) from public high schools in Mexico City. These young people filled out a questionnaire that assessed tobacco use (current smokers' age at first cigarette, smoking frequency and quantity of cigarettes smoked). They were also asked about intention to smoke in the future. Self-efficacy was assessed using items that measured one's capacity to avoid smoking. The results indicated the factorial validity of the smoking-related self-efficacy measure in this sample. Structural equation modeling analyses suggested (X²= 113.319, p<.001; CFI= .99; NFI= .99; GFI= .95; RMSEA= .05) that those young people with lower confidence in their ability to avoid smoking would have higher levels of smoking intention and smoking behavior; moreover, intention to smoke in the future predicts level of smoking. The discussion analyzes the utility of the results for the assessment of self-efficacy, as well as the clinical implications for the people in treatment.

Autoeficacia e intención conductual del consumo de tabaco en adolescentes: validez factorial y relación estructural