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Time in Range is a metric that complements HbA1c and provides actionable information for you and your patients. It helps you quickly assess patients’ glucose, contextualise their HbA1c and increase their Time in Range.
Time in Range
An important metric that goes beyond HbA1c
What is Time in Range?
Time in Range is the percentage of time per day a person spends within target glucose range. The FreeStyle Libre systems◊ automatically calculate the percentage of time your patient spends in, above, or below target range.
The International Consensus sets clear targets for Time in Range1.
Recommended Time in Range for most T1D, T2D, non-pregnant, not older, or at risk adults regardless of insulin therapy:
CIMT = carotid inima-media thickness; TIR = Time in Range; T1 = type 1 diabetes; T2D = type 2 diabetes
Why is Time in Range Important?
Improved %TIR is associated with reduced risk of long term complications of diabetes
Increased %TIR is correlated with reduced risk of diabetes related heart4, kidney3 and eye3,5 disease, as well as better peripheral nerve function6
HbA1c has limitations
HbA1c reflects average glucose over the last 2–3 months; it does not show glycaemic excursions of hyper- and hypoglycaemia.1
An increase in Time in Range results in a decrease in HbA1c.
Estimate of HbA1c for a given Time in Range level based on T1D and T2D studies2:
Time in Range & The FreeStyle Libre Systems
The FreeStyle Libre systems will automatically calculate the percentage of time your patients spend in, above or below target range. This will help identify where your patient needs more support in managing their overall diabetes health.
This Time in Range report shows a person who spent 75% of their day in target glucose range:
The FreeStyle Libre systems help increase %TIR
Time in Range & LibreView
Easily visualise Time in Range for your patients with LibreView
LibreView is a secure8, cloud-based diabetes management system. It provides both healthcare professionals and patients with access to a consistent set of clear, intuitive reports that make it easier and faster to discover patterns and trends.₼
With the AGP report on LibreView you can:
- See Time in Target guidelines and an overview of patient glucose data
- Quickly assess your patient’s Time in Range
- Identify trends and patterns at a glance
- Identify specific times of deviation with the Daily Glucose Profiles
Additional Resources
Educational Modules
Learn more about Time in Range and the Libre Products through our Healthcare Professional education modules.
Webinars
We offer various on-demand webinars for Healthcare Professionals including Understanding Time in Range.
CME Modules
Take part in our three-part CME accredited webcast programme exploring the growing role of Time In Range as a critical metric of glycemic control in diabetes management.
Access Case Studies
Read real-life case studies from local health authorities who have successfully initiated access to glucose-sensing technology.
References & Disclaimers
Images are for illustrative purposes only. Not real patient or data.
◊ FreeStyle Libre systems refers to the FreeStyle Libre 2 and FreeStyle Libre 3 systems
◊◊ The data from this study was collected using the FreeStyle Libre 2 system. FreeStyle Libre 3 system has the same features as the FreeStyle Libre 2 system, therefore the study data is applicable to both products. Diabetes Care. (2019);42(3):400-405.
1. Battelino T, Danne T, Bergenstal RM, et al. Clinical targets for continuous glucose monitoring data interpretation: recommendations from the international consensus on time in range. Diabetes Care. (2019);42(8):1593-1603
2. Vigersky RA, McMahon C. The relationship of hemoglobin A1c to time-in-range in patients with diabetes. Diabetes Technol Ther. (2019);21(2):81-85
3. Beck RW et al. Diabetes Care (2019);42(3):400-405.
4. Lu J, et al. Diabetes Technol Ther. 2020 Feb;22:72-78.
5. Lu J et al. Diabetes Care 2018;41:2370–2376.
6. Li F, et al. Diabetes Res Clin Pract. 2020 Aug;166:108289. doi: 10.1016/j.diabres.2020.108289
7. Leelarathna, L. N Engl J Med. (2022): DOI: 10.1056/NEJMoa2205650.
8. LibreView is ISO27001/27018/27701 certified and HITRUST CSF Certified.
₼ The LibreView website is only compatible with certain operating systems and browsers. Please check www.LibreView.com for additional information.
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