. Author manuscript; available in PMC: 2014 Oct 1.

Published in final edited form as: Pain. 2013 Apr 8;154(10):1946–1952. doi: 10.1016/j.pain.2013.04.009

Table 1.

Sample characteristics by group (mean, SD).

	ELGA^a (n = 22)	VLGA^b (n = 32)	Full term (n = 25)	P value^*
Child age at MEG (years) mean (SD)	7.7 (0.4)	7.7 (0.4)	7.6 (0.5)	0.476
Male gender, n (% male)	12 (54.5%)	11 (34.4%)	8 (32.0%)	0.226
Gestational age at birth (weeks) mean (SD)	27.1 (1.3)	31.1 (1.3)	39.9 (1.3)	0.0001
Birth weight (g) mean (SD)	953 (244)	1593 (354)	3463 (488)	0.0001
Illness severity day 1 (SNAP-II) mean (SD)	18 (8)	5 (7)	–	0.001
Pain-related stress (number of skin-breaking procedures from birth to term) mean (SD)	174 (98)	60 (45)	–	0.001
Mechanical ventilation (days) mean (SD)	23.45 (21.2)	1.4 (3.2)	–	0.0001
WISC-IV Perceptual Reasoning Index (SD)	97.45 (15.06)	105.22 (15.64)	111.76 (14.08)	0.007 a < c
WISC-IV Processing Speed Index (SD)	89.85 (12.14)	99.61 (12.86)	104.52 (17.58)	0.004 a < c
Beery Perception subscore	99.00 (16.31)	105.97 (14.22)	114.48 (15.70)	0.003 a < c

MEG, magnetoencephalography.

P value between groups in 1-way ANOVAs with post hoc Bonferroni tests.