Usability of a point-of-care diagnostic to identify glucose-6-phosphate dehydrogenase deficiency: a multi-country assessment of test label comprehension and results interpretation

Table 1 Questionnaire structure and scoring

Question type	Number of questions	Description	Possible points- unweighted analysis	Possible points, analysis weighted by critical errors*
Multiple choice- critical questions	4	Mutually exclusive multiple-choice questions which if missed, would lead to an incorrect test results without the user knowing	13	12
Multiple choice- noncritical questions	9	Mutually exclusive multiple-choice questions which covered background information,	13	9
Results interpretation	7 (5 valid results, 2 invalid results)	Users were asked to read, record, and interpret predetermined G6PD results based on thresholds provided and told to assume that the results were from female patients	17**	27***
Total possible points			30	48

G6PD: glucose-6-phosphate dehydrogenase
^* For each critical error, a weight of 3 points was assigned. For each non critical error, a weight of 1 point was assigned
^** For each valid result, three points were possible: one for G6PD result transcription, one for haemoglobin result transcription, and one for result interpretation. For each invalid result, one point was possible
^*** For each valid result, five points were possible: three for G6PD result transcription, one for haemoglobin result transcription, and one for result interpretation. For each invalid result, one point was possible

ISSN: 1475-2875