Table 2

Prevalence of current asthma, persistent wheezing, cough, and phlegm at the end of the follow-up period (N = 1933).

Duration of breastfeeding
Current asthma
Persistent wheezing
Persistent cough
Persistent phlegm



n *
Prevalence (%)
n *
Prevalence (%)
n *
Prevalence (%)
n *
Prevalence (%)

0–3 months (N = 346)
27
7.8
17
4.9
27
7.8
25
7.3
4–6 months (N = 385)
20
5.2
14
3.6
22
5.7
20
5.2
7–9 months (N = 528)
32
6.0
14
2.7
22
4.2
15
2.8
10–12 months (N = 434)
37
8.5
13
3.0
21
4.8
21
4.8
> 12 months (N = 240)
21
8.8
16
6.7
17
7.1
19
7.9

* Number of individuals with the health outcome

Fredriksson et al. BMC Pediatrics 2007 7:39   doi:10.1186/1471-2431-7-39