Abstract: Objective: To develop an intervention program for the dietary management of gestational diabetes mellitus patients based on Health Action Process Approach (HAPA) and nudges strategies. Methods: The first draft of a dietary management program for gestational diabetic patients based on a combination of HAPA and nudges strategies was developed using literature review and group discussion. Then a two-round expert correspondence was conducted with 16 experts using the Delphi expert correspondence method to form the final draft of the intervention program. Results: Two rounds of expert consultation were conducted to construct the program with 3 primary indicators (pre-intentional phases, intentional phases, and action phases), 9 secondary indicators, and 25 tertiary indicators. The expert authority coefficients were 0.804 and 0.886, respectively; the Kendall coordination coefficients for the two rounds of correspondence were 0.226 and 0.261, respectively, with statistically significant differences (P<0.001). Conclusion: The intervention program for dietary management of gestational diabetes patients constructed in this study is reliable and practical, and provides a reference basis for the care measures related to dietary management of gestational diabetes patients.

Key words: Health Action Process Approach; nudge; gestational diabetes mellitus; dietary management; Delphi technique