Table 3

 Accuracy of the actigraph in identifying treatment requirements for neonatal abstinence syndrome (NAS)

Actigraph activity meanExperienced clinical decision incorporating NAS score
Pretreatment (3 scores >8 or one >12)No treatment (consecutively scoring <8)Stabilised treatment (3 consecutive scores <6, feeding well and weight gain)
Sensitivity 94% (95% confidence interval 71 to 99); specificity 85% (95% confidence interval 55 to 98).
cpm, Counts per minute
Greater than 90 cpm16 true positive2 false positive0
Less than 90 cpm1 false negative11 true negative5