Development and Validation of a Questionnaire to Predict Intention to Comply to Iron Supplement during Pregnancy
- Author:
Raudah Abd Rahman
1
Author Information
1. Department of Community Health, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Bandar Tun Razak, 56000 Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur, Malaysia.
- Collective Name:Idayu Badilla Idris; Zaleha Md Isa; Rahana Abd Rahman
- Publication Type:Journal Article
- Keywords:
Theory of Planned Behaviour;
adherence to iron supplement;
questionnaire;
development;
Exploratory Factor Analysis;
Confirmatory Factor Analysis.
- From:International Journal of Public Health Research
2021;11(1):1329-1337
- CountryMalaysia
- Language:English
-
Abstract:
Introduction The World Health Organisation (WHO) has recommended iron
supplementation to overcome anaemia in pregnancy. In Malaysia, half of
pregnant women with anaemia do not comply to iron supplement. The purpose
of this study is to develop, assess psychometric properties (via Exploratory
Factor Analysis) and validation (via Confirmatory Factor Analysis) of a
questionnaire that evaluates attitude towards adherence to iron supplement
based on Theory of Planned Behaviour (TPB).
Methods Based on the guidelines for construction of the TPB based questionnaire, 18
items were created initially by using the findings from a semi-quantitative
survey, literature reviews and experts’ opinion. From content validity by 3
experts, 15 items with content validity ratio (CVR) of ≥0.99 were retained.
From a pilot test for exploratory factor analysis (EFA), total of 12 items were
retained, and classified into 3 components and termed as “Attitude”,
“Subjective Norms” and “Perceived Behaviour Control”.
Results Cronbach Alpha for the 12 items was 0.814, and for each component were
0.844, 0.813 and 0.901 respectively, which indicates acceptable internal
consistency. During the Confirmatory Factor Analysis (CFA), a final 10 items
were retained.
Conclusions The construct validity was good where the Fitness Index have achieved the
threshold (p-value >0.05, RMSEA <0.08, CFI >0.90 and the ChiSq/df ratio
<3.00). The convergent validity and composite reliability were good i.e.
Average Variance Extracted (AVE) ≥0.50, and Composite Reliability (CR)
≥0.60 respectively. As a conclusion, this newly developed questionnaire was
validated and potentially reliable in assessing attitude and predicting adherence
to iron supplement among pregnant women specifically in Malaysia.
- Full text:21.2021my0252.pdf
