Variability and trends in corticosteroid use by male United States participants with Duchenne muscular dystrophy in the Duchenne Registry

Table 4 Corticosteroid Use by Birth Year for Males with Duchenne Muscular Dystrophy

Birth Interval (years)	Age at initiation of steroids (years, median, 1st and 3rd quartiles)^a	N	On steroids %, n	Discontinued %, n	Never on steroids %, n	Age 4 to 7 not on steroids^b
1980–89	9 (7, 17)	87	20.7% 18	31.0% 27	48.3% 42	NA	NA
1990–94	8 (6, 10)	138	42.8% 59	29.7% 41	27.5% 38	NA	NA
1995–99	7 (6, 8)	316	66.5% 210	21.2% 67	12.3% 39	NA	NA
2000–04	6 (4, 8)	449	77.7% 349	10.5% 47	11.8% 53	67.6%	46/68
2005–09^c	5 (4, 6)	418	75.6% 316	3.3% 14	21.1% 88	69.6%	156/224

^aFor those who provided age at initiation (overall 60.2%, 692/1148)
^bOnly available for cohorts in which there were registrants in this age range (i.e., after birth year 2000)
^cYoungest members of this cohort were 7 years of age
NA = not available

ISSN: 1471-2377