Table 5.

Univariate Pearson correlations (and p-values) between the variables

	Internalizing behavioral problems	Externalizing behavioral problems	FeNO (ppd)	Life events
Mothers’ observation
Parent domain	.47 (p < .001)	.43 (p < .001)	.20 (p = .06)	.29 (p = .007)
Child domain	.62 (p < .001)	.61 (p < .001)	.13 (p = .23)	.28 (p = .009)
Fathers’ observation
Parent domain	.40 (p = .002)	.13 (p = .34)	.04 (p = .78)	.28 (p = .03)
Child domain	.51 (p < .001)	.45 (p < .001)	.03 (p = .84)	.27 (p = .04)

FeNO fractional concentration of exhaled nitric oxide, ppb parts per billion