Table 2.

Comparison of the Asbest Chrysotile Cohort with other chrysotile cohort studies

Study	N	Birth year (range)	Total person-years	Duration—median years (range)	Cumulative exposure
					Dust (mg/m3 years)		Fibre (fibre/cm3 years)
					Median	Range	Median	Range
Males
Asbest chrysotile cohort	22 463	1891–1992	320 151	10.4 (1.0–59.5)	26.3	0–1641.4	16.3	0–408
Quebec chrysotile miners and millers18	10 918	1891–1920	425 160†			0.0–8000
Qinghai provence chrysotile mine20	1539	1934–1957	34 736	Mean: 27.3 (21.1–33.5)	108.7	1.8–3613.5
Balangero mine, Italy22–24 28	974	1877–1968	35 362	0.5–47			96.5	3–2700‡
South carolina asbestos textile plant25	1256	~1885–~1947	33 141	1.1 (0.1–46.8)			4.4	0.1–700
Females
Asbest chrysotile cohort	13 374	1904–1991	195 204	11.9 (1.0–55.7)	25.1	0–1184.4	16.8	0–400
South carolina asbestos textile plant25	1244	~1885–~1947		0.9 (0.1–43.7)			4.2	0.2–317

NB: No other cohorts explicitly reported on professionally non-exposed workers in published materials.

* Cumulative exposures reported in this table for the Asbest Chrysotile Cohort only include cohort members that were professionally exposed and the employment-years are reported in this table.

†Person-years of follow-up to May 1992 reported for the complete cohort with no exclusions for eligibility or adjustments for analyses.

‡Derived from the published tertiles