. 2017 Dec 21;6(12):e238. doi: 10.2196/resprot.5428

Table 1.

Constructs/components, variables, and measures.

Constructs/components	Variables	Quantitative measures
Readiness for ACP^a (outcome variable)	ACP Stage of change	Stage of change for ACP (based on an item algorithm)^a
Physical functioning	General health status	Short Form-12 v2 Health Surveys Taiwan (Chinese) – Standard Recall (12 items) [46]
Quality of life	Life satisfaction	Life satisfaction subscale (33 items) of Quality of Life Index [47]
Demographics	Tribe, Age, Gender, Life-partnered, Income, Education, Employment, Preferred religion	Tribal identity, Age, Gender, Marital status, Income, Education, Work status, Religion
Knowledge obtained related to ACP	Knowledge about life-sustaining treatment and ACP; previous experiences related to EOL^c	Knowledge of ACP scale (10 items)^a; previous EOL experiences scale (6 items)^a
Intent of Taiwanese indigenous peoples for ACP intervention	Preferred ACP program contents, settings and frequencies, learning methods, possible facilitators, and barriers.	Questions developed for soliciting subjects’ preferred strategies

^aACP: advance care planning.

^bQuantitative measures included in the survey questionnaire were developed by Hsiung and Ferrans [28] based on the Transtheoretical Model of Health Behavioral Change [44] and previous ACP studies.

^cEOL: end-of-life.