From: Infant head growth in male siblings of children with and without autism spectrum disorders
Study | n ASDa | Dev. period of measurement (months) | Mean IQ of subjects | Control group | Method of measurement | 1st year of life principle findings | 12–36 month significant findings | Analytic methodb |
---|---|---|---|---|---|---|---|---|
1. Courchesne et al. 2003 | 48 | Birth—14 | 75 | CDC Norms/FELS longitudinal sample study | OFC and MRI | Birth-14 month (acceleration) | Cross-sectional | |
2. Torrey et al. 2004 | 15 | Birth—14 | 56.8 | NCPP (1959–1965 birth cohorts) | OFC | Difference at birth but no difference in growth trajectory | [no difference] | Cross-sectional, growth curve |
3. Hazlett et al. 2005 | 113 | Birth—36 | 54.1 | Contemporaneous controls with TYP (n = 178) or DD (n = 11) | OFC and MRI | [no difference] | 12–24 months (acceleration) | Cross- sectional, growth curve analysis |
4. Fukumoto et al. 2008 | 85 | Birth—12 | 75.5 | JMHLW 2000 infant physical growth survey | OFC | 1–12 month (acceleration) | Cross-sectional | |
5. Elder et al. 2008 (Study of 77 high- risk sibs) | Not Reported | Birth—24 | Not Reported | 2002 CDC Norms | OFC | Birth-12 month (acceleration) | 12–24 months (deceleration) | Cross-sectional, multilevel modeling |
6. Dawson et al. 2007 (deceleration) | 28 | Birth—36 | 61.5 (Mullen Composite) | 2002 CDC Norms | OFC | Birth-12 month (acceleration) | 12—36 months (relative deceleration) | Cross-sectional, growth curve |
7. Webb et al. 2007 | 28 | Birth—36 | Not Reported | 2000 CDC Norms | OFC | 7–10 month (acceleration) | Cross-sectional | |
8. van Daalen et al. 2007 | 53 | Birth—64 | <70: 33 70–85:6 | 1996, 1997 NOASR | OFC | [no difference] | [no difference] | Cross-sectional |
>85: 14 | ||||||||
9. Constantino et al. [Current Study] | 48 | Birth—36 | 92 | Unaffected sibs and contemporaneous control sib pairs | OFC | Birth—15 month (trend, acceleration) | Cross-sectional, growth curve |