Participants could choose between self-completion of written questionnaire in English, French or German or person-to person interview during which peer researchers provided translation into other African languages if needed.
Self-completion and interview approaches were used considering the convenience of the respondents and ensuring the reliability of the data.
This reduced any potential bias, as limited literacy could lead to a mix of self-completion and researcher-completion.
Data collection involved face-to-face interviews, self-completion, and clinical and physical measurements.
Self-completion and interview versions of ASCOT have four response options per item.
Findings were categorised by mode preference, ease of self-completion, and reasons for any difficulty.
It has been shown to be suitable for self-completion and acceptable to patients.
EQ-5D is designed for self-completion and provides a single index score for health status.
It is patient-centred, suitable for self-completion and is acceptable.
Previous research has indicated that completion of vision-related questionnaires by pen and paper (self-completion) and by interview may not yield equivalent results [ 23].
