A comparison of validated methods used to assess impaired awareness of hypoglycaemia in type 1 diabetes: an observational study
Author(s)
Ghandi, Kshitiz
Pieri, Beatrice
Dornhorst, Anne
Hussain, Sufyan
Type
Journal Article
Abstract
Introduction
Clarke, Gold and Pedersen are validated methods to assess awareness of hypoglycaemia. Identifying impaired awareness of hypoglycaemia (IAH) is critical for supporting people with structured education and diabetes technologies, to reduce harm of hypoglycaemia. This study compares the Clarke score, Gold score and Pedersen methods and their correlations with features of hypoglycaemia unawareness and patient characteristics, to evaluate the accuracy of the methods in identifying IAH.
Methods
This retrospective, observational questionnaire-based study collected routine clinical data from 100 people with type 1 diabetes. The questionnaire included the three validated scoring methods, frequency of severe and nocturnal hypoglycaemia, knowledge and worry of hypoglycaemia and hypoglycaemia symptom scores using the Edinburgh Hypoglycaemia Scale. Data were analysed for IAH prevalence and the associations with features of IAH. The concordance of Clarke, Gold and Pedersen methods was evaluated using Spearman’s correlation coefficient.
Results
The prevalence of IAH in this cohort identified by Clarke, Gold and Pedersen methods was 18%, 19% and 61% respectively. The mean autonomic symptom score in people with IAH was significantly reduced using the Clarke method (P = 0.0002) but not on Gold (P = 0.12) and Pedersen methods (P = 0.79). For people with IAH assessed using the Clarke method, scores for night-time worry regarding hypoglycaemia (P = 0.04) and self-reported frequency of nocturnal hypoglycaemia (P = 0.001) were increased. Spearman’s correlation coefficients between Pedersen and Clarke and Pedersen and Gold were Rs = 0.555 (P < 0.001) and Rs = 0.645 (P < 0.001) respectively. A moderate association was observed between Clarke and Gold Rs = 0.5669 (P < 0.001).
Conclusion
Whilst Clarke and Gold methods determined a similar prevalence of IAH, people identified with IAH assessed by the Clarke method had a significant association with the features and characteristics of IAH, including reduced autonomic symptoms. This study suggests that performing more than one score is important for a reliable risk assessment of IAH.
Clarke, Gold and Pedersen are validated methods to assess awareness of hypoglycaemia. Identifying impaired awareness of hypoglycaemia (IAH) is critical for supporting people with structured education and diabetes technologies, to reduce harm of hypoglycaemia. This study compares the Clarke score, Gold score and Pedersen methods and their correlations with features of hypoglycaemia unawareness and patient characteristics, to evaluate the accuracy of the methods in identifying IAH.
Methods
This retrospective, observational questionnaire-based study collected routine clinical data from 100 people with type 1 diabetes. The questionnaire included the three validated scoring methods, frequency of severe and nocturnal hypoglycaemia, knowledge and worry of hypoglycaemia and hypoglycaemia symptom scores using the Edinburgh Hypoglycaemia Scale. Data were analysed for IAH prevalence and the associations with features of IAH. The concordance of Clarke, Gold and Pedersen methods was evaluated using Spearman’s correlation coefficient.
Results
The prevalence of IAH in this cohort identified by Clarke, Gold and Pedersen methods was 18%, 19% and 61% respectively. The mean autonomic symptom score in people with IAH was significantly reduced using the Clarke method (P = 0.0002) but not on Gold (P = 0.12) and Pedersen methods (P = 0.79). For people with IAH assessed using the Clarke method, scores for night-time worry regarding hypoglycaemia (P = 0.04) and self-reported frequency of nocturnal hypoglycaemia (P = 0.001) were increased. Spearman’s correlation coefficients between Pedersen and Clarke and Pedersen and Gold were Rs = 0.555 (P < 0.001) and Rs = 0.645 (P < 0.001) respectively. A moderate association was observed between Clarke and Gold Rs = 0.5669 (P < 0.001).
Conclusion
Whilst Clarke and Gold methods determined a similar prevalence of IAH, people identified with IAH assessed by the Clarke method had a significant association with the features and characteristics of IAH, including reduced autonomic symptoms. This study suggests that performing more than one score is important for a reliable risk assessment of IAH.
Date Issued
2021-01
Date Acceptance
2020-10-30
Citation
Diabetes Therapy, 2021, 12 (1), pp.441-451
ISSN
1869-6953
Publisher
Adis, Springer Healthcare
Start Page
441
End Page
451
Journal / Book Title
Diabetes Therapy
Volume
12
Issue
1
Copyright Statement
© The Author(s) 2020
Open Access. This article is licensed under a
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line to the material. If material is not included
in the article’s Creative Commons licence and
your intended use is not permitted by statutory
regulation or exceeds the permitted use, you
will need to obtain permission directly from the
copyright holder. To view a copy of this licence,
visit http://creativecommons.org/licenses/by-nc/4.0/.
Open Access. This article is licensed under a
Creative Commons Attribution-NonCommercial 4.0 International License, which permits
any non-commercial use, sharing, adaptation,
distribution and reproduction in any medium
or format, as long as you give appropriate credit
to the original author(s) and the source, provide
a link to the Creative Commons licence, and
indicate if changes were made. The images or
other third party material in this article are
included in the article’s Creative Commons
licence, unless indicated otherwise in a credit
line to the material. If material is not included
in the article’s Creative Commons licence and
your intended use is not permitted by statutory
regulation or exceeds the permitted use, you
will need to obtain permission directly from the
copyright holder. To view a copy of this licence,
visit http://creativecommons.org/licenses/by-nc/4.0/.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000591139700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
1 diabetes
ADULTS
Endocrinology & Metabolism
FREQUENCY
Hypoglycaemia
Hypoglycaemia unawareness
Impaired awareness of hypoglycaemia
Life Sciences & Biomedicine
MANAGEMENT
Science & Technology
Type
Publication Status
Published
Date Publish Online
2020-11-20