Table IV.

Positive predictive value (PPV) and negative predictive value (NPV) of WMA predicting motor impairment

Motor impairment	Any WMA		Moderate–severe WMA
	PPV	NPV	PPV	NPV
All participants (n=193)
Moderate–severe impairment	92.5 (31.8–97.9)	40.7 (32.5–49.3)	34.0 (21.5–48.3)	91.4 (85.5–95.5)
Mild–severe impairment	80.2 (70.8–87.6)	43.3 (33.3–53.8)	26.0 (17.6–36.0)	94.9 (88.4–98.3)
Excluding infants with cerebral palsy at 2y (n=178)
Moderate–severe impairment	90.0 (76.3–97.2)	43.3 (33.0–50.0)	27.5 (14.6–43.9)	91.3 (85.3–95.4)
Mild–severe impairment	77.1 (66.6–85.6)	44.2 (34.0–54.8)	21.7 (13.4–32.1)	94.7 (88.1–98.3)

Values are mean (95% confidence intervals). WMA, white matter abnormalities.