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Table 1 TCDD soil measurements, serum TCDD and TEQ levels in residents in the Seveso area.

From: Cancer incidence in the population exposed to dioxin after the "Seveso accident": twenty years of follow-up

Zone Mean soil
TCDD
(μg/m2)a
Serum TCDD
(ppt)
Serum TEQb
(ppt)
Serum TEQb
without TCDD
(ppt)
  Min - Max No.
Subjects
Median Median (Min - Max) Median (Min - Max)
A 15.5 - 580.4 296 447.0c - -
   7 73.3d 94.0 (60.6 - 141.7) 39.0 (16.7 - 51.8)
B 1.7 - 4.3 80 94.0c - -
   51 12.4d 43.2 (17.7 - 194.3) 31.8 (11.4 - 131.7)
R 0.9 - 1.4 48 48.0c NA NA
Reference NA 52 5.5d 38.8 (10.2 - 92.1) 32.3 (8.2 - 82.4)
     p < 0.0001e p = 0.92e
  1. NA, not available
  2. aReference [13]
  3. bCalculated using TEF WHO-2005 [16]; includes seven dioxins, 10 furans, four coplanar PCBs.
  4. Levels below detection limit (DL) were set to DL/√2
  5. cBlood samples collected in 1976 (reference [14])
  6. dBlood samples collected in 1993-94 (reference [15])
  7. eKruskal-Wallis test