. Author manuscript; available in PMC: 2016 Mar 1.

Published in final edited form as: J Child Neurol. 2014 Jun 17;30(3):307–313. doi: 10.1177/0883073814538500

Table 1.

Study population characteristics

	No caffeine (N=14)	Low caffeine (N=10)	High caffeine (N=21)
Sex (M/F)	8/6	6/4	13/8
Gestational age in weeks (mean, SD)	^* 34.9 ± 3.5	28.7 ± 3.7	^** 25.9 ± 1.8
Postnatal age at ERP in days (mean, SD)	^* 48.4 ± 31.7	70.8 ± 33.8	^N75.8 ± 25.5
Postmenstrual age at ERP in weeks (mean, SD)	^*41.1 ± 3.6	38.8 ± 4.4	^N 36.8 ± 3.7
Cumulative caffeine at ERP (median, mg/kg)	0	145.75	322.3

p for No caffeine vs. any caffeine (Low or High) < 0.01

^**

p for Low vs High caffeine exposure groups < 0.01

p > 0.7 for Low vs High caffeine exposure groups