In Avedis Donabedian's model of quality assurance in health care, the three components used to assess quality of care are:

• A Input, process, output
• B Access, equity, efficiency
• C Planning, implementation, evaluation
• D Structure, process, outcome ✓

Explanation

Donabedian classified quality assessment into structure (attributes of the setting: staff, equipment, buildings), process (what is actually done in giving and receiving care), and outcome (effects on patient health status). Input-output terminology belongs to systems analysis of programmes, not Donabedian's triad. Access, equity, and efficiency are dimensions of health system performance under other frameworks, not his classification.

Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.

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