Maternal Modification and Breastfeeding
SPT taken less than 1year,
1 year to less than 2 years,
2 years to less than 5 years,
5 years and above.
Subjects were also divided into length breastfed for each age group; less than one month, one month up to 6 months and greater than 6 months (Saarinen, Kajosaari, 1995).
Statistical Analysis Data were analysed using SPSS (SPSS for Windows Version 12.0, September 2003, SPSS Inc. Chicago, Illinois USA). Two tailed analysis were used with a p-value of < .05 considered statistically significant. Data were analysed for normality using the Shapiro- Wilk test and Levene's test of homogeneity of variance. Non parametric tests were used on data which was not distributed normally. Sibling data were used in between-group analysis. Pearson’s Chi-squared test, the computed Odds Ratios (OR) and corresponding 95% Confidence Intervals (CI) were used to compare eczema and asthma and the presence of a positive SPT for each age group. Mann-Whitney U was used to compare the number of positive SPTs between-groups for each age.
Within-group analysis of the effect of breast feeding length on number of positive SPT’s was made using Mann-Whitney U test. Within-group comparisons of breastfeeding length and the presence of a positive SPT, eczema or asthma were done using Pearson’s Chi-squared test, the computed OR and corresponding 95% CI. All children whose mother had not modified their diet were included in the within-group analysis.
Results Two hundred and seventy five subjects who were a sibling to a child with food allergy had mothers followed dietary modification guidelines (Modified group). There were 1305 subjects those whose mothers did not follow these guidelines (Non modified group) of which 271 were siblings to a child with a food allergy.