Validity and reliability of Tobacco Control Among Students of Public Health Questionnaire

Aim: To evaluate the validity and reliability of Tobacco Control Among Students of Public Health Questionnaire. Methods: A total of 112 undergraduates majored in public health were surveyed using the questionnaire. The split-half reliability was calculated using Spearman-Brown formula, and Cronbach's α coefficient was used to evaluate internal consistency reliability; Spearman rank correlation was used to analyze the correlation between items and their subordinate fields to evaluate the content validity, and factor analysis was used to assess the construct validity of the questionnaire. Results: The split-half reliability was 0.887, α coefficients of 3 dimensions and total questionnaire were 0.824,0.820,0.635,and 0.821, respectively. The correlation coefficients of scores of the items with its subordinate dimensionality were 0.529-0.847,and those with the total scores were 0.328-0.699. The cumulative variance contribution rate of the three common factors were 60.64%,and the communality of 64.29% items after extraction of common factor was greater than 0.50. Conclusion: The validity and reliability of the questionnaire is well.