Table 3.

Age of surgical sterilization and age of natural menopause according to type of surgical sterilization among the women in Cohort 1

		Type of tubal ligation
Characteristic	No surgical sterilization (N=411)	Cautery (N=56)	Pomeroy or Modified Pomeroy (N=37)	Hulka or Filshie clips (N=10)	Unknown type (N=135)	Salpingectomy (N=6)
Age of tubal ligation (years)
Mean ± SD	--	34.9 ± 5.0	34.2 ± 4.1	37.2 ± 7.4	34.0 ± 4.7	39.5 ± 7.2
Range		24.1-46.0	26.2-45.0	26.5-45.7	23.2-42.8	31.6-51.0
Age of natural menopause (years)
Mean ± SD	50.1 ± 3.5	50.9 ± 3.5	51.1 ± 4.3	50.1 ± 3.4	50.0 ± 3.6	52.2 ± 1.5
Range	33-59	42-61	37-57	42-54	42-58	50-54