Risk of coronary events 55 Years after Thymic irradiation in the Hempelmann cohort

Cardio-Oncology

Table 1 Response Rates to the 2004–2008 Follow-up Survey of The Hempelmann Cohort by Thymic Irradiation Status

Response Status	Total, n (%) (N = 7490)^a	Irradiated, n (%) (N = 2657)^a	Non-Irradiated Siblings, n (%) (N = 4833)^a
Deceased	857 (11.4)^b	345 (13.0) ^b	512 (10.6) ^b
Not known to be deceased	6633 (88.6)	2312 (87.0)	4321 (89.4)
Total Surveys Mailed	6633 (100)	2312 (100)	4321 (100)
Responded (completed)^c	3071 (46.3)	1303 (56.4)	1768 (40.9)
Declined^c	456 (6.9)	107 (4.6)	349 (8.1)
Did Not Respond^c	2457 (37.0)	696 (30.1)	1761 (40.7)
Undeliverable^c,d	648 (9.8)	204 (8.8)	444 (10.2)

^a From original study population, 199 irradiated and 220 non-irradiated siblings were excluded from the current cohort because they died before age 5 or were untraceable within 5 years after birth
^b As a percentage of the entire cohort
^c As a percentage of the cohort not known to be deceased. Columns may not sum to 100% as a result of rounding. The “did not respond” category may contain lost to follow-up individuals, because we included people who did not respond and whose survey packets were not returned by post office
^d Contact information could not be confirmed, or survey returned by post office but the individual was not known to be deceased

ISSN: 2057-3804