Table 3.

Cutoff Selection of Radiographic Scores on Day 9 and 10.

	Score	Accuracy	Sensitivity	Specificity	Yonden’s Index	PPV¶	NPV§
Day 9	2.7	64%	57.1%	66.7%	0.238	40%	80%
	4.3	72%	57.1%	77.8%	0.349	50%	82%
	6	80%	57.1%	88.9%	0.460	67%	84%
	17.8	84%	42.9%	100%	0.429	100%	82%
	29	76%	14.3%	100%	0.143	100%	75%
Day 10	2	60%	71.4%	55.6%	0.27	39%	82%
	3.4	64%	57.1%	66.7%	0.238	40%	80%
	6	72%	57.1%	77.8%	0.349	50%	82%
	7	80%	57.1%	88.9%	0.46	67%	84%
	10	84%	57.1%	94.4%	0.516	80%	85%
	24.7	84%	42.9%	100%	0.429	100%	82%
	34.7	76%	14.3%	100%	0.143	100%	75%

Note. ^¶PPV = Positive predictive value, ^§NPV = Negative predictive value.

Bold values indicate the optimal cutoff radiographic score on day 9 and day 10, showing maximum sum of sensitivity and specificity.