Table 1.

Patient characteristics

	Total n=32	EOA n=11	DCD n=10	Central hypotonia n=11	p
Age, y:moa
Mean (SD)	9:10 (3:3)	11:4 (3:6)	8:8 (2:4)	9:4 (3:6)	0.170
Range	4:0–17:0	6:0–17:0	6:0–13:0	4:0–14:0
Disease onset, y:mo
Median (IQR)	1:6 (0:6–3:9)	2:0 (0:6–4:0)	1:6 (0:6–3:3)	1:6 (0:6–3:0)	0.914
Range	0:0–8:0	0:0–8:0	0:0–5:0	0:0–5:0
Disease duration, y:moa
Mean (SD)	7:11 (3:1)	8:11 (3:11)	7:4 (2:5)	7:7 (2:11)	0.449
Range	2:6–15:0	3:0–15:0	4:0–11:0	2:6–12:6
Phenotypic severityb
Median (IQR)	1 (1–2)	2 (1–2)	1 (1–2)	1 (0–1)	0.001c
Range	0–3	1–3	1–2	0–1
SARATOTAL
Median (IQR)	3.0 (0.0–8.0)	9.5 (8.0–14.0)	2.8 (0.4–3.6)	0.0 (0.0–2.3)d	<0.001c
Range	0.0–15.5d	4.5–15.5	0.0–8.0d	0.0–3.0d
SARAGAIT
Median (IQR)	2.0 (0.0–3.9)	5.5 (3.5–7)	1.3 (0.0–2.5)d	0.0 (0.0–0.5)d	<0.001c
Range	0.0–8.0d	2.0–8.0	0.0–2.5d	0.0–2.0d
SARAFINGER‐NOSE/FINGER‐CHASE
Median (IQR)	0.75 (0.0–2.0)	2.0 (1.0–2.5)	0.3 (0.0–1.0)	0.0 (0.0–0.5)	<0.001c
Range	0.0–3.5	0.5–3.5	0.0–2.0	0.0–1.25
SARAKINETIC
Median (IQR)	1.1 (0.0–3.4)	4.5 (2.5–6.0)	0.8 (0.0–2.1)d	0.0 (0.0–1.0)d	<0.001c
Range	0.0–6.5d	0.5–6.5	0.0–4.5d	0.0–2.0d
SARASPEECH
Median (IQR)	0.0 (0.0–2.0)	2.0 (2.0–3.0)	0.0 (0.0–0.0)	0.0 (0.0–0.0)	<0.001c
Range	0.0–3.5	0.0–3.5	0.0–1.0	0.0–0.0
PBS
Median (IQR)	54.1 (50.5–55.9)	48.9 (43.3–53.5)	54.3 (53.0–55.4)	56.0 (55.9–56.0)e	0.001c
Range	23.9–56.0e	23.9–56.0e	44.0–55.9	51.3–56.0e

^aNormal distribution.

^bPhenotypic severity of primary feature (0=normal, 1=mild, 2=moderate, 3=severe).

^cSignificantly different. Although most p‐values reached the level of significance, early‐onset ataxia (EOA) and developmental coordination disorder revealed a quantitative and phenotypic overlap. From this perspective, one cannot clinically use absolute Scale for Assessment and Rating of Ataxia (SARA) scores for group assignment.

^dNegative age‐corrected SARA scores are expressed as 0 (i.e. optimal value).

^eAge‐corrected Paediatric Balance Scale (PBS) scores >56 are expressed as 56 (i.e. optimum values). IQR, interquartile range.