. Author manuscript; available in PMC: 2023 Jun 11.

Published in final edited form as: Infancy. 2023 Mar 15;28(3):650–666. doi: 10.1111/infa.12537

TABLE 3.

Summarized characteristics for the TD and AR groups (mean ± SD).

Group	TD	AR	ρ
Age/adjusted age (days)	113.45 ± 73.40	267.44 ± 129.86	0.008
Sex	4 females, 5 males	3 females, 8 males	0.642
Race	8 White, 2 other, 1 declined	4 White, 2 other, 2 declined, 1 Black
AIMS (total)	28.33 ± 17.64	16.91 ± 12.54	0.124
Gestational age (weeks)	31.22 ± 6.36	39.27 ± 1.27	0.015
Head circumference (cm)	43.04 ± 2.08	40.93 ± 2.10	0.037
Body length (cm)	65.44 ± 7.40	62.97 ± 6.42	0.442
Weight (kg)	7.34 ± 1.43	7.13 ± 2.05	0.791
Total recorded hours	19.58 ± 1.84	19.06 ± 1.81	0.717
Number of active segments	136 ± 25	123 ± 24	0.783

Abbreviations: AIMS, Alberta Infant Motor Scale; AR, developmental disabilities; TD, typical development.