Table 1.

In- and exclusion criteria for the CP group.

Inclusion Criteria	Exclusion Criteria
Diagnosis of CP based on the predominant type of motor impairment and classified according to the criteria proposed by Himmelmann et al. (2005) [26]. CP diagnosis was confirmed according to medical history, brain magnetic resonance results and clinical examination, OR, in children under 24 months: At high risk for developing CP, based on the presence of one of the following [27,28]: - Cystic periventricular leukomalacia, diagnosed on serial ultrasound assessments of the brain [29] - Unilateral or bilateral parenchymal lesion of the brain, diagnosed using MRI [30] - Term/near-term asphyxia resulting in Sarnat 2 or 3 [31] with brain lesions on MRI and/or with neurological dysfunction during infancy suggesting the development of CP - Neurological dysfunction suggestive of development of CP	Functional surgery on bones and/or muscles of the legs Selective dorsal rhizotomy in the last 12 months Severe epilepsy GMFCS IV and V Above the age of five years Brain damage above the age of one year

Abbreviations: CP = cerebral palsy; GMFCS = gross motor function classification system; MRI = magnetic resonance imaging.