Unilateral CP n= 39 OBPP n=34 ULRD n=37 Total n=110 pa Doing by oneself (%) 77 (25-100) 87 (27.59-100) 93 (65.52-100) 85 (25-100) <0.001 Using the affected hand (%) 79 (25-100) 84 (0-100) 96 (61-100) 86 (0-100) 0.001 Holding objects (%) 40 (0-100) 64 (0-100) 59 (0-100) 54 (0-100) 0.020 Grasp efficacyb 52.4 (33.62-91.62) 74.1 (27.33-99.96) 74.2 (44.19-99.96) 66.3 (27.33-99.96) <0.001 Time takenb 50.3 (34.90-88.99) 75.7 (36.55-99.97) 72.5 (42.09-99.97) 65.6 (34.90-99.97) <0.001 Feeling botheredb 53.3 (38.85-88.14) 77.4 (10.40-99.96) 75.1 (46.50-99.96) 68.1 (10.40-99.96) <0.001 aKruskal-Wallis test for between-group comparisons bCHEQ mean logits transformed to a 0-100-scale Higher scores are positive

Table 2: Children’s Hand-use Experience Questionnaire scores for children and adolescents with unilateral cerebral palsy (unilateral CP), obstetric brachial plexus palsy (OBPP), and upper limb reduction deficiency (ULRD); mean (range).