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Clinical characteristics and MRI angle measurements and assessments
Group 1 (n = 16) Group 2 (n = 32) P Value^{^a}
Gestational age (mean) (wk) 35.6 ± 4.2 37.3 ± 4.5 .1^{^b}
Postmenstrual age at MRI (mean) (wk) 37.6 ± 4.8 39.8 ± 6.5 .2^{^b}
Vermis height (mean) (mm) 20.5 ± 4.4 23.7 ± 3.9 .01^{^b^e}
Transcerebellar diameter (mean) 
    Axial 48.6 ± 9.1 52.3 ± 9.8 .2^{^b}
    Coronal 48.8 ± 9.6 52.7 ± 9.7 .2^{^b}
Cranial base angle (mean) 130.3° ± 4.0° 134.8° ± 5.3° .005^{^c^e}
Tentorial angle (mean) 55.4° ± 3.4° 46.6° ± 5.8° <.001^{^c^e}
Infratentorial angle (mean) 52.2° ± 6.5° 47.7° ± 4.0° .001^{^b^e}
Intraventricular hemorrhage (No.) (%) 8 (47) 0 (0) <.001^{^d^e}
Cerebellar abnormality (No.) (%) 9 (56) 0 (0) <.001^{^d^e}
    Hemorrhagic lesion 6 (67) 
    Hemorrhagic-cystic lesion 3 (33) 
Enlarged extracerebral space (No.) (%) 13 (81) 0 (0) <.001^{^d^e}
    Mild 10 (77) 
    Severe 3 (23) 
Delayed cortical gyrification (No.) (%) 12 (75) 0 (0) <.001^{^d^e}
WMI after cerebral hemorrhage (No.) (%) 9 (56) 0 (0) <.001^{^d^e}
    Punctate white matter lesion 7 (78) 
    Cystic lesion 2 (22) 
Abnormality in DWI (n = 12) (No.) (%) 7 (58) - 
    Focal restriction 6 (86) 
    Extensive restriction 1 (14) 
Corpus callosum abnormality (No.) (%) 4 (25) 0 (0) <.001^{^d^e}
    Vertical appearance 3 (75) 
    Hypoplasia 1 (25) 
Note:—WMI indicates white matter injury.
↵a Adjusted for gestational age as appropriate.
↵b Mann-Whitney U test.
↵c T test.
↵d Fisher exact test.
↵e Significant.