Abstract: Objective To develop the satisfaction assessment scale for primary vaccination clinic services and to test its reliability and validity. Methods The initial scale for evaluating the satisfaction of primary vaccination clinic service was developed by using literature research, interviews, and expert survey. The formal scale was obtained by field investigation of parents of children aged 0 - 6 years in vaccination clinic after screening items, and the reliability and validity of the scale were evaluated. Results The final scale contained five dimensions and 30 items. Exploratory factor analysis extracted five common factors, which were service standardization, service accessibility and tangibility, humanistic care, responsiveness, and service guarantee, with a cumulative explained variance percentage of 73.64%. Confirmatory factor analysis showed a χ²/df ratio of 2.042, RMSER of 0.067, CFI of 0.942, TLI of 0.933, all indicating a good model fit. The CR values for the five dimensions were 0.943, 0.931, 0.855, 0.943, and 0.861, respectively. Similarly, the AVE values were 0.664, 0.618, 0.665, 0.770, and 0.674, respectively, indicating ideal aggregation validity. However, the square roots of AVE for service standardization and service accessibility and tangibility were smaller than the correlation coefficients among some factors, suggesting slightly poor discriminant validity. The Cronbach's α coefficient of the total scale was 0.977, and the Guttman split-half coefficient was 0.932, both indicating good reliability. Conclusion The reliability and validity of the vaccination satisfaction evaluation scale prepared in this study are acceptable, which can provide a tool for improving the quality of vaccination service.

Key words: SERVQUAL, Vaccination service, Satisfaction, Scale development, Reliability and validity test