Season of Birth and Exceptional Longevity: Comparative Study of American Centenarians, Their Siblings, and Spouses
Table 5
Odds ratios ( values) to become a centenarian as predicted by conditional logistic regression (fixed effects) for different age cut-off subgroups. Effects of month of birtha.
Variable
All siblings
Siblings survived to age 30
Siblings survived to age 50
Siblings survived to age 70
Month of birth:
January
1.13 (0.387)
1.11 (0.472)
1.11 (0.463)
1.09 (0.537)
February
1.25 (0.101)
1.25 (0.109)
1.24 (0.124)
1.16 (0.303)
March
Reference
Reference
Reference
Reference
April
1.15 (0.320)
1.15 (0.337)
1.16 (0.320)
1.09 (0.567)
May
1.20 (0.218)
1.17 (0.288)
1.19 (0.251)
1.15 (0.373)
June
1.20 (0.229)
1.00 (0.254)
1.18 (0.284)
1.11 (0.486)
July
1.03 (0.855)
1.19 (0.991)
1.01 (0.941)
1.00 (0.990)
August
1.25 (0.110)
1.24 (0.125)
1.27 (0.100)
1.21 (0.198)
September
1.44 (0.006)
c
1.43 (0.009)c
1.45 (0.007)
c
1.39 (0.022)
October
1.43 (0.008)
c
1.37 (0.021)
c
1.37 (0.022)
c
1.27 (0.099)
November
1.51 (0.003)
b,c
1.48 (0.005)
c
1.47 (0.006)
c
1.41 (0.017)
December
1.17 (0.266)
1.13 (0.380)
1.17 (0.283)
1.11 (0.486)
Female sex
3.77 (<0.001)
3.82 (<0.001)
3.80 (<0.001)
3.41 (<0.001)
Pseudo
0.0811
0.0861
0.0871
0.0766
Number of observations
12,132
10,393
9,724
8,123
aStatistically significant effects () are highlighted in bold.
bStatistically significant after Bonferroni adjustment.
cStatistically significant after Benjamini-Hochberg procedure.
