Samirah N Abdu-Aguye1 
,
Ruth U Abi1,
Fatima I Auwal1,
Aishatu Shehu2,
Elijah NA Mohammed3
For correspondence:- Samirah Abdu-Aguye Email: sn.abduaguye@gmail.com Tel:+2348032019135
Accepted: 26 September 2022 Published: 28 October 2022
Citation: Abdu-Aguye SN, Abi RU, Auwal FI, Shehu A, Mohammed EN. Establishing convergent validity of a medication literacy assessment instrument for use within the Nigerian setting. Trop J Pharm Res 2022; 21(10):2153-2159 doi: 10.4314/tjpr.v21i10.16
© 2022 The authors.
This is an Open Access article that uses a funding model which does not charge readers or their institutions for access and distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0) and the Budapest Open Access Initiative (http://www.budapestopenaccessinitiative.org/read), which permit unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited..
Purpose: To establish convergent validity of a previously designed medication literacy instrument for use in Nigeria.
Methods: A cross-sectional study was conducted in Zaria, Kaduna State from May to August 2021, with structured instruments administered to conveniently sampled members of the public via one-on-one interviews to collect data. These instruments included a previously designed medication literacy assessment instrument and the Newest Vital Sign United Kingdom version (NVS-UK) health literacy assessment questionnaire. Data obtained was reported using descriptive and inferential statistics.
Results: Three hundred respondents were interviewed, majority of whom were females (51 %) and aged between 15 – 25 (76.6 %). The percentage of correct responses to the NVS-UK questions ranged from 22 to 58.3 %, while the total number of NVS-UK questions answered correctly by respondents ranged from 0 to 6 with a mean of 2.2 ± 1.7. Respondents’ NVS-UK scores were associated with their highest level of education completed (p = 0.001). The NVS-UK showed adequate internal consistency (Cronbach’s Alpha = 0.7) and validation of the developed medication literacy instrument against the NVS-UK demonstrated a Spearman’s rho correlation coefficient of 0.42.
Conclusion: The designed instrument is valid and can be used to assess medication literacy within the country.
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