Table 2.

Time-weighted average arsenic exposure from 41 years of age to date of enrollment.

	Arsenic concentration (μg/L)
Percentile	Entire cohort (n = 56,378)	Enrolled in Copenhagen (n = 39,378)	Enrolled in Aarhus (n = 17,000)
Minimum	0.05	0.05	0.09
1st	0.05	0.05	0.4
5th	0.3	0.05	0.8
25th	0.6	0.5	2.0
50th	0.7	0.6	2.1
75th	2.0	0.9	2.1
95th	2.1	2.0	2.5
99th	5.7	2.0	18.1
Maximum	25.3	15.8	25.3