Table 3 Incidence of CL at ages 0–4 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%

1293.5

1

Ref.

233.5

1

Ref.

1059.5

1

Ref.

 ⩽38%

1237.4

1.05

[0.97–1.13]

199.5

1.06

[0.88–1.28]

1037.9

1.04

[0.96–1.13]

 >38%

599.3

1.02

[0.92–1.12]

83.1

1.15

[0.9–1.46]

516.2

0.99

[0.89–1.11]

Migrants from another département

 ⩽12%

1171.3

1

Ref.

245.4

1

Ref.

925.4

1

Ref.

 ⩽21%

1277.6

0.98

[0.91–1.06]

210.3

0.99

[0.83–1.19]

1067.3

0.98

[0.9–1.07]

 >21%

681.3

0.97

[0.88–1.06]

60.5

1.09

[0.84–1.43]

620.8

0.95

[0.86–1.06]

Migrants from another région

 ⩽7%

1177.9

1

Ref.

176.2

1

Ref.

1001.2

1

Ref.

 ⩽13%

1380.8

1.00

[0.93–1.09]

220.3

1.07

[0.88–1.31]

1160.5

0.99

[0.91–1.08]

 >13%

571.5

1.09

[0.99–1.21]

119.7

1.20

[0.95–1.5]

451.8

1.07

[0.96–1.19]

Migrants from distant a communes

 ⩽L1b

1353.5

1

Ref.

186.4

1

Ref.

1021.3

1

Ref.

 ⩽L2c

1132.0

1.05

[0.97–1.13]

217.7

0.95

[0.78–1.15]

1029.9

1.02

[0.94–1.12]

 >L2c

644.7

1.11

[1.02–1.22]

112.2

1.25

[1.01–1.56]

562.3

1.09

[0.98–1.21]

Weighted average migration distance d (km)

 ⩽82

1223.1

1

Ref.

203.8

1

Ref.

1018.8

1

Ref.

 ⩽185

1397.1

1.06

[0.98–1.14]

248.5

1.19

[0.99–1.44]

1148.6

1.03

[0.95–1.12]

 >185

510.0

1.14

[1.03–1.26]

63.9

1.41

[1.09–1.83]

446.1

1.09

[0.98–1.22]

Commuters

 ⩽L3e

1208.9

1

Ref.

194.3

1

Ref.

1053.9

1

Ref.

 ⩽L4f

1270.5

0.98

[0.91–1.06]

214.4

1.12

[0.93–1.36]

973.5

0.9

[0.82–0.98]

 >L4f

650.8

0.96

[0.87–1.05]

107.5

1.17

[0.93–1.48]

586.1

0.93

[0.84–1.03]

  1. E=expected number of cases; SIRR=SIR (standardised incidence ratio) ratio.
  2. SIRR estimated by Poisson 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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