Table 5.

Percent of False Classifications by TIMPSI Cutscore and Age Group

	AtRisk1		AtRisk2		AtRisk3		AtRisk4
Age Group	False Negative	False Positive	False Negative	False Positive	False Negative	False Positive	False Negative	False Positive
PCA 34–35 wks*	15.1%	2.3%	11.6%	7.0%	8.1%	10.5%	5.8%	15.1%
PCA 36–37 wks	14.8%	3.7%	9.9%	11.1%	6.2%	18.5%	3.7%	29.6%
PCA 38–39 wks	21.2%	2.4%	14.1%	8.2%	5.9%	14.1%	3.5%	22.4%
PCA 40–41 wks	18.8%	0.0%	14.6%	3.1%	12.5%	8.3%	5.2%	21.9%
2–3 wks AA**	15.5%	6.2%	8.2%	12.4%	4.1%	21.6%	3.1%	27.8%
4–5 wks AA	19.3%	2.4%	6.0%	13.3%	6.0%	15.7%	3.6%	21.7%
6–7 wks AA	12.4%	1.1%	5.6%	5.6%	3.4%	10.1%	3.4%	16.9%
8–9 wks AA	15.5%	2.4%	10.7%	4.8%	4.8%	10.7%	2.4%	19.0%
10–11 wks AA	16.9%	1.4%	5.6%	7.0%	2.8%	11.3%	2.8%	15.5%
12–13 wks AA	22.9%	0.0%	11.4%	2.9%	10.0%	5.7%	4.3%	14.3%
14–15 wks AA	11.9%	0.0%	6.0%	4.5%	3.0%	10.4%	0.0%	29.9%
16–17 wks AA	13.6%	0.0%	1.2%	7.4%	1.2%	11.1%	1.2%	21.0%

^*wks PCA = postconceptional age in weeks

^**wks AA = post term age in weeks, adjusted for prematurity