We developed the Health-Friendly Activity Index (HFAI) to comprehensively measure the health-friendly activities of corporations or organizations. We validated the developed tool and reported on its use as an assessment tool to improve consumers’ health-related outcomes. This was a cross-sectional study. Development of the HFAI questionnaire followed a three-phase process: item generation, item construction, and validation with field testing. Using relevance and feasibility criteria, we developed a 105-item questionnaire with six domains (Governance and Infrastructure, Needs Assessment, Planning, Implementation, Monitoring and Feedback, and Outcomes). To assess the sensitivity and validity of the questionnaire, the HFAI and Contribution Assessment Tool for Consumer’s Health (CATCH) were administered to 302 participants (151 employers and 151 employees) from 151 Korean companies. The CATCH measured the contribution of each company to the physical, mental, social, and spiritual health of its consumers. To estimate the reliability and validity of all five HFAI domains and their respective scales, Cronbach’s α coefficients and correlation coefficients were used. Each domain and scale of the HFAI exhibited a Cronbach’s α coefficient between 0.80 and 0.98 for the employers and employees. The overall HFAI and its six domains correlated significantly and positively with all health outcomes such as physical, mental, social, and spiritual status scores evaluated using the CATCH (Spearman’s correlation range: 0.37 to 0.68). The HFAI, a unique assessment tool with acceptable psychometric properties, can help corporate managers assess their health-friendly activities.

To test reliability and validity, both employers and employees were selected independently as participants from 1,500 eligible companies between July and August 2020. The inclusion criteria for employers were as follows: (1) are in charge of human resources, general affairs, management, finance, or labor, (2) are the chief executive officer or representative of the employer, and (3) voluntarily agreed to participate in the survey. The inclusion criteria for employees were as follows: (1) are in charge of development, planning, or marketing, (2) are representatives of employees, and (3) voluntarily agreed to participate in the survey. There were no exclusion criteria. Two web survey systems, Computer Assisted Web Interview (CAWI) and Computer Assisted Mobile Interview (CAMI) that enable online responses by sending survey requests to participants’ email accounts and phone numbers, were applied. The companies were selected with consideration of the size, industry, and business type for obtaining a representative national sample; this sample was pooled for the web survey by the Hankook Research Co., Ltd., (Seoul, Korea) since 2015. A total of 151 companies (10% response rate) responded to the self-reported questionnaire.