Table 3

Maternal age-specific IMR estimates by district of residence and infant mortality rate ratio estimates

District

Maternal age


<25

25-29

30-34

35-39

> = 40


Messina

Infant deaths*/live births

4/2418

8/4435

24/5917

10/3153

10/742


IMR (×1000)

1.6

1.8

4.1

3.2

13.5


Corrected** IMR (×1000)

2.9

3.2

7.2

5.6

23.8


Palermo

Infant deaths*/live births

11/7175

29/11622

39/13116

13/6803

8/1426


IMR (×1000)

1.5

2.5

3.0

1.9

5.6


Corrected** IMR (×1000)

2.3

3.7

4.4

2.8

8.2



Messina

Rate Ratio*** (95% CI)

1.1 (0.3-3.4)

1.2 (0.5-2.9)

2.6 (1.3-5.4)

2.1 (0.9-4.9)

8.8 (3.7-20.7)


Palermo

Rate Ratio*** (95% CI)

1 (Ref.)

1.6 (0.8-3.3)

1.9 (0.1-3.8)

1.2 (0.6-2.8)

3.7 (1.5-9.1)


*Maternal age was not available for 90/246 deceased infants.

**Corrected assuming that infant deaths with missing maternal age were distributed like the deaths in the same district where maternal age was available.

***Estimated from a Poisson regression model, including term for district, maternal age and their interaction.

Mazzucco et al. BMC Public Health 2011 11:817   doi:10.1186/1471-2458-11-817

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