Artificial Neural Network Individualised Prediction of Time to Colorectal Cancer Surgery

Table 3

Predictive ANN accuracy for each analysis. Training consisted of 70% of the cohort selected and random with the remaining patients used for testing.

Time from diagnosis to surgery	Sample	Observed	Predicted		Percent correct
			Time to surgery under; ()	Time to surgery greater; ()
4 weeks	Training	4 weeks or less	100	93	51.8%
		>4 weeks	69	166	70.6%
		Overall percent	39.5%	60.5%	62.1%
	Testing	4 weeks or less	43	44	49.4%
		>4 weeks	33	85	72.0%
		Overall percent	37.1%	62.9%	62.4%
8 weeks	Training	8 weeks or less	342	8	97.7%
		>8 weeks	63	28	30.8%
		Overall percent	91.8%	8.2%	83.9%
	Testing	8 weeks or less	158	2	98.8%
		>8 weeks	20	12	37.5%
		Overall percent	92.7%	7.3%	88.5%
12 weeks	Training	12 weeks or less	366	11	97.1%
		>12 weeks	29	30	50.8%
		Overall percent	90.6%	9.4%	90.8%
	Testing	12 weeks or less	168	2	98.8%
		>12 weeks	16	11	40.7%
		Overall percent	93.4%	6.6%	90.9%