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. Author manuscript; available in PMC: 2008 Dec 1.
Published in final edited form as: Dev Psychol. 2008 Sep;44(5):1335–1353. doi: 10.1037/a0013030

Table 1.

Child Medical and Demographic Characteristics by Intervention Group

PALS I-II
PALS I-DAS II
DAS I-PALS II
DAS I-II
Characteristic Term VLBW Term VLBW Term VLBW Term VLBW
Mean birth weight in grams 3,444 (326) 992 (337) 3,274 (381) 994 (320) 3,326 (383) 1,203 (501) 3,305 (371) 1,177 (388)
Mean gestational age in weeks 39.9 (0.3) 28.7 (2.3) 39.9 (0.2) 28.7 (2.2) 40.0 (0.0) 30.2 (3.2) 40.0 (0.0) 29.5 (2.9)
Risk status (%) 44 66 58 42 45 55 47 53
Female (%) 57 43 60 40 44 55 48 52
n 15 19 19 14 23 28 23 26

Note. Values in parentheses represent the group standard deviation. PALS = Playing and Learning Strategies; DAS = Developmental Assessment Screening; I = intervention in infancy; II = intervention in toddler–preschool period; VLBW = very low birth weight.