Evaluation of a theory of planned behaviour-based breastfeeding intervention in Northern Irish schools using a randomized cluster design.
OBJECTIVE
The aim of this research was to evaluate the effectiveness of a school-based intervention designed to enhance young people's motivations to breastfeed.


METHODS
A cluster randomized controlled trial was conducted involving 50 post-primary schools from across Northern Ireland. However, dropout and exclusion criteria utilized for the current study resulted in an effective sample size of 42 schools.


METHODS
The intervention was delivered in two 35-min classroom sessions targeting those beliefs identified by the theory of planned behaviour (TPB) as significant in predicting motivation to breastfeed. Questionnaires incorporating the key components of the TPB were administered to all intervention and control schools at baseline, 1 and 6 months post-intervention. Multi-level modelling was used to analyse the data.


RESULTS
Findings suggest that the intervention was effective in that it increased females' intentions to breastfeed, expanded their knowledge and led to more favourable attitudes and perceptions of subjective norms. Notably, females' knowledge increased more in secondary schools than in grammar schools irrespective of whether they were control or intervention schools.


CONCLUSIONS
The research has provided evidence to support the use of the TPB in the design and evaluation of an intervention to increase females' intentions to breastfeed.
School of Psychology, University of Ulster, Co. Londonderry, UK.
Melanie
M
Giles
Carol
C
McClenahan
Cherie
C
Armour
Samantha
S
Millar
Gordon
G
Rae
John
J
Mallett
Barbara
B
Stewart-Knox
D000293:Adolescent; D001942:Breast Feeding / Q000523:psychology*; D005260:Female; D015438:Health Behavior; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D033182:Intention; D008297:Male; D009042:Motivation; D055361:Multilevel Analysis; D009660:Northern Ireland; D011582:Psychological Theory; D012572:School Health Services; D016896:Treatment Outcome