Table 1 Rate of agreement between the comprehensive risk judgment by the algorithm and the physician’s judgement.

		Staff findings
		Normal	Follow-up required	Abnormal	Total
Comprehensive judgment as device output	Normal	497	13	1	511
	Abnormal	3	0	12	15
	Total	500	13	13	526
Rate of agreement including follow-up required				96.8% (94.9%, 98.1%)
Rate of agreement excluding follow-up required				99.2% (98.0%, 99.8%)

As an overall evaluation of the blood flow to the grafted tissue, the device outputs a comprehensive risk judgement calculated from the assessment of each of the three parameters as normal or abnormal. The rate of agreement between the algorithm’s judgement and the physician’s judgement was 96.8% overall when the follow-up required category was considered as abnormal. The rate of agreement was 99.2% when cases judged as neither normal nor abnormal (follow-up required) were excluded.

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