Table 1. Accuracy of SmartNet in determining ITN state.

		ITN state according to participant diaries
		Folded up	Unfurled
SmartNet-detected	Folded up	True Positive: ITN folded up and detected by SmartNet	False Positive:ITN unfurled but SmartNet indicating folded up
	Unfurled	False Negative:ITN folded up but SmartNet indicates unfurled	True Negative: ITN unfurled and SmartNet indicates unfurled

Sensitivity = True Positives / (True Positives + False Negatives) = Accuracy of SmartNet in detecting a folded up net

Specificity = True Negatives/ (True Negatives + False Positives) = Accuracy of SmartNet in detecting an unfurled net