Season of Birth and Exceptional Longevity: Comparative Study of American Centenarians, Their Siblings, and Spouses

Table 1

Number of centenarians and their siblings at different stages of data collection and cleaning.

Type of records	Centenarians			Number of shorter-lived siblings
	Males	Females	Total
All initial nonduplicate records for centenarians born in 1880–1895 with names of parents available	7,174	18,277	25,451
Centenarians having detailed information on birth and death dates of their parents	6,370	16,757	23,127	172,091
Centenarians having detailed information on birth and death dates of their parents and siblings	707	2,127	2,834	21,893
Centenarians after data cleaning with confirmed death dates through the linkage to DMF	365	1,209	1,574	10,885