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Table 1 Background information

From: Geographical patterns in blood lead in relation to industrial emissions and traffic in Swedish children, 1978–2007

  Landskrona Trelleborg
  1978–1987 1988–1994 1995–2007 1978–1987 1988–1994 1995–2007
N 979 657 890 652 238 501
Geometric mean B-Pb (μg/l) 49.7 30.9 18.4 46.5 28.2 18.2
Range 14.0 – 249.6 11.0 – 122.7 5.7 – 79.8 14.0 – 162.4 10.0 – 68.0 6.1 – 62.0
>50 μg/l, N (%) 488 (49.8) 57 (8.7) 15 (1.7) 271 (41.6) 11 (4.6) 2 (0.4)
Sex, N (%)
Girl 467 (47.7) 355 (54.0) 431 (48.4) 344 (52.8) 115 (48.3) 259 (51.7)
Boy 512 (52.3) 302 (46.0) 459 (51.6) 308 (47.2) 123 (51.7) 242 (48.3)
School year, N (%)
B-Pb range (μg/l)
      
Preschool (4–7 years) 77 (7.9)
21 – 84
0 (0.0)
---
0 (0.0)
---
0 (0.0)
---
0 (0.0)
---
0 (0.0)
---
1st (8 years) 42 (4.3)
24 – 88
140 (21.3)
12 – 73
111 (12.5)
6 – 55
146 (22.4)
14 – 162
29 (12.2)
16 – 68
80 (16.0)
7 – 40
2nd (9 years) 164 (16.8)
14 – 129
303 (46.1)
11 – 122
352 (39.6)
6 – 72
151 (23.2)
16 – 115
93 (39.1)
10 – 67
175 (34.9)
6 – 49
3rd (10 years) 150 (15.3)
15 – 102
214 (32.6)
13 – 68
410 (46.1)
6 – 80
137 (21.0)
15 – 124
116 (48.7)
12 – 64
246 (49.1)
8 – 62
Intermediate stage and senior levels (>10 years of age) 546 (55.8)
16 – 250
0 (0.0)
---
17 (1.9)
12 – 68
218 (33.4)
19 – 134
0 (0.0)
---
0 (0.0)
---
Smoking parents, N (%)
Yes
(mother/father or both)
6 (0.6) 367 (55.9) 334 (37.5) 66 (10.1) 140 (58.8) 240 (47.9)
No 2 (0.2) 280 (42.6) 376 (42.2) 49 (7.5) 98 (41.2) 261 (52.1)
Missing 971 (99.2) 10 (1.5) 180 (20.2) 537 (82.4) 0 (0.0) 0 (0.0)
Potentially Pb-exposing hobby, N (%)
Yes 92 (9.4) 126 (19.2) 128 (14.4) 81 (12.4) 57 (23.9) 66 (13.2)
No 887 (90.6) 531 (80.8) 762 (85.6) 571 (87.6) 181 (76.1) 435 (86.8)
Birth country, N (%)
Nordic countries 936 (95.6) 622 (94.7) 809 (90.9) 623 (95.6) 231 (97.1) 461 (92.0)
All other countries 31 (3.2) 35 (5.3) 79 (8.9) 21 (3.2) 7 (2.9) 40 (8.0)
Missing 12 (1.2) 0 (0.0) 2 (0.2) 8 (1.2) 0 (0.0) 0 (0.0)
  1. Background information for the 3 917 measurements on blood-lead concentrations (B-Pb) in Swedish children, carried out during the period 1978–2007