Table 4.

Aligning pipeline outputs with QDB labels for evaluation.

QDB	${\mathit{SQI}}_{\mathit{fuzzy}}$	${\mathit{SQI}}_{\mathit{avg}},{\mathit{SQI}}_{\mathit{hrv}},{\mathit{SQI}}_{\mathit{QRS}}$
Class 0	Excellent	SQI $\ge 0.8$
Class 1	Barely Acceptable	$0.5\le$ SQI $<0.8$
Class 2	Unacceptable	SQI $<0.5$