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. 2025 May 10;25:325. doi: 10.1186/s12877-025-06008-2

Table 2.

Traffic light rating criteria for interpreting feasibility outcomes

Feasibility outcome Description Green Yellow Red
Eligibility Proportion of clients screened who were eligible for our study ≥ 80% 60–79% ≤ 59%
Recruitment Proportion of eligible clients who enrolled in the study ≥ 80% 60–79% ≤ 59%
Retention Proportion of enrolled participants who completed 3-month follow-up ≥ 80% 60–79% ≤ 59%
Fidelity Proportion of clinical services that were implemented as intended ≥ 80% 60–79% ≤ 59%
Acceptability Perceived satisfaction with services delivered (e.g., frozen meals, clinical services) Assessed qualitatively

Criteria adapted from Hilton et al. [32]. Clinical services = registered dietitian nutritionist and/or occupational therapy services