Table 1. Descriptives for the study populations (Krummhörn, Finland and Québec) including sample sizes, mean ages at marriage and first birth as well as proportions of individuals confronted with mortality separated by sex.

Descriptives		Sex	Krummhörn	Finland	Québec
No. of individuals (total)	Age first marriage	Male	N = 967	N = 1,448	N = 15,433
		Female	N = 1,064	N = 1,542	N = 15,350
	Age first birth	Male	N = 875	N = 1,305	N = 14,124
		Female	N = 940	N = 1,392	N = 14,017
No. of individuals with mortality exposure	Age first marriage	Male	N = 327 (∼34%)	N = 575 (∼40%)	N = 6928 (∼45%)
		Female	N = 310 (∼30%)	N = 558 (∼36%)	N = 8317 (∼54%)
	Age first birth	Male	N = 310 (∼35%)	N = 526 (∼40%)	N = 6389 (∼45%)
		Female	N = 296 (∼31%)	N = 535 (∼38%)	N = 7548 (∼54%)
Mean age at first marriage [years]	No mortality exposure	Male	29.35+/− 5.76	26.66+/− 5.48	28.32+/− 6.31
		Female	27.21+/− 5.39	25.40+/− 5.58	23.00+/− 5.56
	Mortality exposure	Male	28.80+/− 5.05	26.48+/− 5.00	26.92+/− 5.20
		Female	26.84+/− 5.61	26.46+/− 5.91	22.89+/− 5.34
Mean age at first birth [years]	No mortality exposure	Male	29.79+/− 5.84	29.34+/− 6.78	29.17+/− 6.15
		Female	27.18+/− 4.82	27.01+/− 5.51	23.74+/− 4.77
	Mortality exposure	Male	29.25+/− 5.28	27.93+/− 6.16	27.97+/− 5.17
		Female	26.76+/− 4.59	26.61+/− 5.00	23.64+/− 4.77

Note: Mortality exposure refers to the exposure to sibling deaths before the focal individual reaches age 15.