In order to enable early detection and prevention of stunting, it is necessary to improve the early stunting detection skills of health cadres. Currently, research on stunting prevention and early detection generally still utilizes generic educational media and has not yet integrated local cultural approaches for multiethnic communities in the Kapuas River peripheral area. This study aimed to examine the effectiveness of a culture-based website media on the early stunting detection skills of health cadres. This study employed a quasi-experimental design using a pre-test and post-test with a control group approach. Sampling was conducted using a total sampling technique involving 110 respondents, who were divided into two groups. Statistical analysis included the Marginal Homogeneity test to assess differences in cadres’ skills between the two groups, as well as the Mann–Whitney U test to compare post-test skills between the intervention and control groups. The research instrument was a questionnaire measuring health cadres’ skills in early stunting detection. The results showed a significant improvement in cadres’ skills in the intervention group, with the proportion of cadres in the good category increasing from 45.5% to 85.5%, compared to the control group, which experienced a decrease from 69.1% to 65.5%, although remaining within the good category. The Marginal Homogeneity test revealed a statistically significant result (p = 0.001; p < 0.05), indicating that the culture-based website media was effective in improving health cadres’ early stunting detection skills. The use of culture-based website media was proven to be effective in enhancing cadres’ skills in early stunting detection. This study recommends cross-sector collaboration to improve internet access, provide assistance to health cadres, and integrate digital educational media in order to enhance the effectiveness of stunting prevention efforts.
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