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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Acta Obstet Gynecol Scand. 2017 Sep 27;96(11):1322–1329. doi: 10.1111/aogs.13228

Table 3.

The AUCs of individual risk markers for fetuses of 23–34 weeks. Results are reported on a held out test set after training using five-fold cross-validation on training data (70/30 split). The best performing feature, the minutes per hour in high variation (HiMinph), was significantly superior than gestational age and markers associated with low variation episodes (p<0.01), with the exception of (LoMinph). No difference was found when comparing to features also derived from high variability episodes. Gender has been excluded from the analysis as it will not be available in anticipated use context.

23–34 weeks gestation
Features* Training data AUC (% [95% CI])
LTVinHi 74 [70–78]
LTVinLo 69 [65–73]
STVinHi 71 [67–75]
STVinLo 46 [41–50]

AvgDurHi 73 [69–76]
AvgDurLo 71 [66–75]
NoHiEpiph 75 [71–79]
NoLoEpiph 69 [65–73]
HiMinph 75 [71–79]
LoMinph 71 [67–75]
HiEpiStrtMin 63 [59–67]

RecGest 48 [43–52]
*

All features are defined in Table 2.