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Sebastian-Valles F, Martínez-Alfonso J, Arranz Martin JA, Jiménez-Díaz J, Hernando Alday I, Navas-Moreno V, Armenta Joya T, Fandiño García MDM, Román Gómez GL, Lander Lobariñas LE, Martinez de Icaya P, Sampedro-Nuñez MA, Martínez-Vizacaíno V, Marazuela M. Scans per day as predictors of optimal glycemic control in people with type 1 diabetes mellitus using flash glucose monitoring: what number of scans per day should raise a red flag? Acta Diabetol 2024; 61:343-350. [PMID: 37930420 PMCID: PMC10948530 DOI: 10.1007/s00592-023-02204-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 10/16/2023] [Indexed: 11/07/2023]
Abstract
AIMS This study aimed to determine the minimum frequency of flash glucose monitoring (FGM) scans necessary for optimal glycemic control in patients with type 1 diabetes (T1D). METHODS Data were collected from 692 patients (47.5% female, with a median age of 47.4 years) who used FGM systems daily and recorded their clinical variables and device data. RESULTS Logistic regression models showed that performing more than 12 scans per day was associated with improved T1D control (OR = 4.22, p < 0.001) and a reduction in HbA1c (7.6 vs 7.0%, 60-53 mmol/mol p < 0.001). However, those performing less than 6 scans showed no improvement in HbA1c (7.9 vs 7.8%, 63-61 mmol/mol p = 0.514). Thirteen daily scans were determined as the optimal cutoff point for predicting optimal glycemic control using a maximally selected rank algorithm. Significant reductions were observed in mean glucose (< 0.001), coefficient of variation (< 0.001), HbA1c (< 0.001), and an increase in TIR (< 0.001) in patients who performed more than 12 daily scans. CONCLUSIONS The results suggest that a higher frequency of daily scans by T1D patients using FGM systems leads to improved chronic glycemic control. The minimum recommended frequency for optimal control is 13 scans per day, and more than 6 daily scans are needed to improve HbA1c.
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Affiliation(s)
- Fernando Sebastian-Valles
- Department of Endocrinology and Nutrition, Hospital Universitario de La PrincesaInstituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain.
| | - Julia Martínez-Alfonso
- Department of Family and Community Medicine, Hospital La Princesa/Centro de Salud Daroca, 28006, Madrid, Spain
| | - Jose Alfonso Arranz Martin
- Department of Endocrinology and Nutrition, Hospital Universitario de La PrincesaInstituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | - Jessica Jiménez-Díaz
- Department of Endocrinology and Nutrition, Hospital Universitario Severo Ochoa, 28194, Leganés, Madrid, Spain
| | - Iñigo Hernando Alday
- Department of Endocrinology and Nutrition, Hospital Universitario Basurto, 48013, Bilbao, Spain
| | - Victor Navas-Moreno
- Department of Endocrinology and Nutrition, Hospital Universitario de La PrincesaInstituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | - Teresa Armenta Joya
- Department of Endocrinology and Nutrition, Hospital Universitario de La PrincesaInstituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | | | - Gisela Liz Román Gómez
- Department of Endocrinology and Nutrition, Hospital Universitario Severo Ochoa, 28194, Leganés, Madrid, Spain
| | | | | | - Miguel Antonio Sampedro-Nuñez
- Department of Endocrinology and Nutrition, Hospital Universitario de La PrincesaInstituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | - Vicente Martínez-Vizacaíno
- Health and Social Care Research Center, Universidad de Castilla-La Mancha, 16071, Cuenca, Spain
- Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca, Chile
| | - Mónica Marazuela
- Department of Endocrinology and Nutrition, Hospital Universitario de La PrincesaInstituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
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Sebastian-Valles F, Martínez-Alfonso J, Arranz Martin JA, Jiménez-Díaz J, Hernando Alday I, Navas-Moreno V, Joya TA, Fandiño García MDM, Román Gómez GL, Garai Hierro J, Lander Lobariñas LE, Martínez de Icaya P, Sampedro-Nuñez MA, Martínez-Vizcaíno V, Marazuela M. Impact of socioeconomic status on chronic control and complications of type 1 diabetes mellitus in users of glucose flash systems: a follow-up study. BMC Med 2024; 22:37. [PMID: 38273326 PMCID: PMC10809494 DOI: 10.1186/s12916-024-03254-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/10/2024] [Indexed: 01/27/2024] Open
Abstract
BACKGROUND This study investigates the association between socioeconomic status (SES) and glycemic control in individuals with type 1 diabetes (T1D) using flash glucose monitoring (FGM) devices within a public health system where these technologies are freely available and utilized according to recommended guidelines. METHODS A follow-up study of 1060 adults (mean age 47.4 ± 15.0 years, 49.0% women) with T1D, receiving care at three Spanish university hospitals that regularly employ the FGM system. SES was assessed using the Spanish Deprivation Index and the average annual net income per person. Glycemic data were collected over a 14-day follow-up period, including baseline glycated hemoglobin (HbA1c) levels prior to sensor placement, the last available HbA1c levels, and FGM-derived glucose metrics. Individuals with sensor usage time < 70% were excluded. Chronic micro and macrovascular complications related to diabetes were documented. Regression models, adjusted for clinical variables, were employed to determine the impact of SES on optimal sensor control (defined as time in range (TIR) ≥ 70% with time below range < 4%) and disease complications. RESULTS The average follow-up was of 2 years. The mean TIR and the percentage of individuals with optimal control were higher in individuals in the highest SES quartile (64.9% ± 17.8% and 27.9%, respectively) compared to those in the lowest SES quartile (57.8 ± 17.4% and 12.1%) (p < 0.001). Regression models showed a higher risk of suboptimal control (OR 2.27, p < 0.001) and ischemic heart disease and/or stroke (OR 3.59, p = 0.005) in the lowest SES quartile. No association was observed between SES and the risk of diabetic nephropathy and retinopathy. FGM system improved HbA1c levels across all SES quartiles. Although individuals in the highest SES quartile still achieved a significantly lower value at the end of the follow-up 55 mmol/mol (7.2%) compared to those in the lowest SES quartile 60 mmol/mol (7.6%) (p < 0.001), the significant disparities in this parameter between the various SES groups were significantly reduced after FGM technology use. CONCLUSIONS Socioeconomic status plays a significant role in glycemic control and complications in individuals with T1D, extending beyond access to technology and its proper utilization. The free utilization of FGM technology helps alleviate the impact of social inequalities on glycemic control.
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Affiliation(s)
- Fernando Sebastian-Valles
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain.
| | - Julia Martínez-Alfonso
- Department of Family and Community Medicine, Centro de Salud Daroca, 28006, Madrid, Spain
| | - Jose Alfonso Arranz Martin
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | - Jessica Jiménez-Díaz
- Department of Endocrinology and Nutrition, Hospital Universitario Severo Ochoa, Leganés, 28194, Madrid, Spain
| | - Iñigo Hernando Alday
- Department of Endocrinology and Nutrition, Hospital Universitario Basurto, 48013, Bilbao, Spain
| | - Victor Navas-Moreno
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | - Teresa Armenta Joya
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | | | - Gisela Liz Román Gómez
- Department of Endocrinology and Nutrition, Hospital Universitario Severo Ochoa, Leganés, 28194, Madrid, Spain
| | - Jon Garai Hierro
- Department of Endocrinology and Nutrition, Hospital Universitario Basurto, 48013, Bilbao, Spain
| | | | | | - Miguel Antonio Sampedro-Nuñez
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
| | - Vicente Martínez-Vizcaíno
- Health and Social Care Research Center, Universidad de Castilla-La Mancha, 16071, Cuenca, Spain
- Facultad de Ciencias de La Salud, Universidad Autónoma de Chile, Talca, Chile
| | - Mónica Marazuela
- Department of Endocrinology and Nutrition, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria de La Princesa, Universidad Autónoma de Madrid, 28006, Madrid, Spain
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