Table.

Townsend scores of enumeration districts with and without families with Duchenne muscular dystrophy

Group	Duchenne muscular dystrophy					No Duchenne muscular dystrophy (n=6624)		Significance
	No	Median	Range	Interquartile range		Median	Interquartile range
All cases	229	3.44	−5.74 to 10.12	0.34 to 5.45		1.46	−2.04 to 4.74	P<0.0001
History in earlier generation	42	3.15	−5.74 to 10.12	0.65 to 5.05		1.46	−2.04 to 4.74	P<0.0001
New mutation in mother	62	4.45	−4.71 to 9.59	1.76 to 5.63		1.46	−2.04 to 4.74	P<0.0001
New mutation in child	40	2.63	−5.66 to 8.46	−0.38 to 4.96		1.46	−2.04 to 4.74	P=0.001
No earlier history: mutation origin unknown	85	3.35	−2.63 to 7.41	−1.87 to 5.36		1.46	−2.04 to 4.74	P<0.0001