Table 2 Incidence of CL at ages 0–14 years over the period 1990–2003 and population movements in the French communes between 1990 and 1999, for all destination communes and by ‘isolation’ status (see text)

From: Childhood leukaemia and population movements in France, 1990–2003

 

All communes

‘Isolated’ communes

‘Non-isolated’ communes

 

E

SIRR

95% CI

E

SIRR

95% CI

E

SIRR

95% CI

All migrants

 ⩽30%

2584.9

1

Ref.

491.6

1

Ref.

2092.2

1

Ref.

 ⩽38%

2483.9

1.05

[0.99–1.11]

408.3

1.06

[0.93–1.21]

2075.6

1.04

[0.98–1.11]

 >38%

1205.4

0.98

[0.92–1.05]

167.8

1.05

[0.88–1.25]

1037.6

0.97

[0.9–1.04]

Migrants from another département

 ⩽12%

2424.8

1

Ref.

511.2

1

Ref.

1912.6

1

Ref.

 ⩽21%

2554.4

1.01

[0.96–1.07]

432.2

1.03

[0.9–1.17]

2122.2

1.00

[0.94–1.07]

 >21%

1294.9

0.99

[0.93–1.06]

124.3

1.06

[0.87–1.29]

1170.5

0.98

[0.91–1.06]

Migrants from another région

 ⩽7%

2407.8

1

Ref.

367.8

1

Ref.

2039.0

1

Ref.

 ⩽13%

2731.4

1.01

[0.96–1.07]

453.7

1.09

[0.95–1.26]

2277.8

1

[0.94–1.06]

 >13%

1134.8

1.08

[1.01–1.16]

246.2

1.18

[1.01–1.39]

888.6

1.06

[0.98–1.15]

Migrants from distant a communes

 ⩽L1b

2765.1

1

Ref.

388.7

1

Ref.

2079.8

1

Ref.

 ⩽L2c

2237.8

1.06

[1–1.12]

447.4

1.02

[0.89–1.18]

2023.3

1.02

[0.96–1.09]

 >L2c

1271.2

1.08

[1.02–1.16]

231.6

1.14

[0.97–1.33]

1102.2

1.08

[1–1.16]

Weighted average migration distance d (km)

 ⩽82

2507.7

1

Ref.

421.3

1

Ref.

2085.4

1

Ref.

 ⩽185

2775.6

1.05

[1–1.11]

513.3

1.17

[1.02–1.34]

2262.2

1.03

[0.97–1.09]

 >185

990.8

1.10

[1.02–1.18]

133.1

1.24

[1.02–1.5]

857.7

1.07

[0.99–1.16]

Commuters

 ⩽L3e

2424.1

1

Ref.

405.7

1

Ref.

2124.5

1

Ref.

 ⩽L4f

2559.9

1.03

[0.97–1.09]

442.1

1.13

[0.98–1.29]

1949.1

0.96

[0.9–1.02]

 >L4f

1260.0

1.01

[0.94–1.08]

219.8

1.10

[0.93–1.3]

1131.7

0.98

[0.91–1.05]

  1. E=expected number of cases; SIRR=SIR (standardised incidence ratio) ratio.
  2. SIRR estimated by Poisson's regression.
  3. a⩾100 km for all communes; ⩾60 km for ‘isolated’ communes and ⩾120 km for ‘non-isolated’ communes.
  4. b0.07 for all communes; 0.08 for ‘isolated’ communes; 0.06 for ‘non-isolated’ communes.
  5. c0.12 for all communes; 0.14 for ‘isolated’ communes; 0.11 for ‘non-isolated’ communes.
  6. dAdjusted for the proportion of migrants.
  7. e0.42 for all communes; 0.33 for ‘isolated’ communes; 0.45 for ‘non-isolated’ communes.
  8. f0.59 for all communes; 0.44 for ‘isolated’ communes; 0.60 for ‘non-isolated’ communes.
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