Table 2. Improved tactile processing amplitude is associated with increasing gestational age at birth in preterm infants.

Associations between ERP amplitudes to touch, gestational age at birth (GA) and postnatal days (PND)

Univariable models
Predictor	Stimulus	Slope**	Confidence Interval	p
GA	Touch	0.08	(0.05, 0.12)	<0.001*
PND	Touch	−0.02	(0.07, 0.04)	0.524
GA	Sham	0.01	(−0.02, 0.05)	0.530 [−0.684]
PND	Sham	0.01	(0.04, 0.06)	0.684
Multivariable model for tactile stimulus
	Value	Standard Error	t-value	p
Intercept	−3.19	1.31	−2.43	0.02
GA	0.10	0.03	2.85	0.01
PND	0.02	0.04	0.54	0.59

^*Wilcoxon Rank Sum test. All results expressed as median amplitude (interquartile range).

^**Increase in microvolts ERP response per 1week unit in the predictor

Table 2 is related to Figure S1