Low penetrance in facioscapulohumeral muscular dystrophy type 1 with large pathological D4Z4 alleles: a cross-sectional multicenter study

Table 1 Descriptive statistics of age and sex

	ICs n (%)	Affected carriers n (%)	Unaffected carriers n (%)	Non carriers n (%)	P value
	65	34	25	60
Gender					0.002
Male	44 (68%)^a,b	18 (53%)	7 (28%)^a	24 (40,%)^b
Female	21 (32%)	16 (47%)	18 (72%)	36 (60%)
Age, years (mean ± standard deviation)	51.2 ± 14.9	50.5 ± 17.4	47.6 ± 19.5	46.9 ± 17.4	0.482

Overall age comparison: Kruskall–Wallis test p = 0.482. Overall gender comparison: chi square test p = 0.002. Significant pairwise comparisons: ^aICs versus unaffected carriers p = 0.0007 and ^bICs versus non carriers p = 0.001.

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