Table 1. Instruments used for evaluation and interpretation of variables.

Instrument	Portuguese version	Range	Interpretation
SAHLPA short version – evaluates health literacy	Apolinario et al.(4)	0-18	Analyzed as an interval variable. Can be analyzed as a dichotomous variable; scores <14 define poor health literacy
SKILLD – evaluates diabetes knowledge	Souza et al.(26)	0-10	Analyzed as an interval variable. No cut-off value
MOS – evaluates 5 social support dimensions	Griep et al.(27)	0-95	Analyzed as an interval variable; data sets divided into terciles. No cut-off value
MRCI – evaluates pharmacological treatment complexity	Melchiors et al.(28)	Up to 0	Analyzed as an interval variable. No cut-off value
GDS-15 – evaluates symptoms of depression	Almeida et al.(30)	0-15	Participants scoring >5 were considered depressed

SAHLPA: Short Assessment of Health Literacy for Portuguese-speaking adults - short version. SKILLD: Spoken Knowledge in Low Literacy Patients with Diabetes; MOS: Medical Outcomes Study; MRCI: Medication Regimen Complexity Index; GDS-15: Geriatric Depression Scale.