Background
The competence of public health workers is crucial for grassroots public health service capabilities. This study aimed to establish a competency model for public health workers and to test the reliability and validity of the model.
Methods
An evaluation indicators scale of competency of public health workers in Shanghai community health service centers (CHSCs) was constructed through a literature review, expert consultation, behavioral event interviews and questionnaire surveys. A questionnaire survey was carried out with 3809 public health workers from 249 Shanghai CHSCs to test the reliability and validity of the constructed scale.
Results
Exploratory factor analysis identified 5 common factors: comprehensive ability, professional spirit, professional knowledge, professional skills, research and development ability. The cumulative variance contribution rate was 62.241%. The factor load for each item ranged from 0.495 to 0.868. The overall Cronbach's alpha coefficient for the questionnaire was 0.985, for the five dimensions ranged from 0.916 to 0.969. The overall split-half reliability of the questionnaire was 0.842, and that of the five dimensions ranged from 0.913 to 0.952, with the Guttman split-half reliability coefficient ranging from 0.912 to 0.949. The correlation coefficients for all scale items with the total score ranged from 0.591 to 0.854 (P < 0.01). The correlation coefficients between each item and each dimension ranged from 0.434 to 0.925. Confirmatory factor analysis showed that the model had a good fitting effect (χ2/df = 2.288, TLI = 0.943, CFI = 0.957, IFI = 0.958, NFI = 0.928, RMSEA = 0.081). Using self-efficacy, self-esteem, work pressure, work motivation, and job satisfaction as benchmarks, all dimensions of the scale demonstrated significant positive correlations with the total scores of various benchmark questionnaires.
Conclusions
The constructed scale of competency of public health workers in Shanghai CHSCs has good reliability and validity and can be used as a tool to evaluate the competency level of public health workers.