• Xinxin Wang, Wei Xiao, Zhanpeng Liang, Shixiang Li, and Qizhi Tang.
• Affiliated Guangdong Hospital of Integrated Traditional Chinese and Western Medicine of Guangzhou University of Chinese Medicine, Nanhai District, Foshan City, Guangdong Province, China.
• Medicine (Baltimore). 2023 Dec 29; 102 (52): e36308e36308.

BackgroundOnce-weekly insulin is expected to improve treatment compliance and durability and lead to better glycemic control. Several clinical trials on once-weekly insulin have recently been published. We conducted a systematic review and meta-analysis to investigate the efficacy and safety of once-weekly insulin versus once-daily insulin in type 2 diabetes (T2D).MethodsThe following databases were searched for studies: PubMed, EMBASE, and Cochrane library (From January 1, 1946 to May 9, 2023). All randomized trials comparing weekly versus daily insulin in T2D were eligible for inclusion. Data analysis was performed using STATA 17.0 software (Stata Corporation, College Station, TX). The main outcomes and indexes included reduction in Hemoglobin A1c (HbA1c), fasting plasma glucose and bodyweight, proportion of patients achieving HbA1c < 7%, time-in-range 70 to 180 mg/dL and adverse events.ResultsThis systematic review and meta-analysis included 7 randomized controlled studies involving 2391 patients (1347 receiving 1-week insulin and 1044 receiving 1-day insulin). Once-weekly insulin was not inferior to once-daily insulin in HbA1c change [estimated treatment difference (ETD) = -0.05; 95% confidence intervals (CI): -0.14 to 0.04), HbA1c  < 7% (odds ratio = 1.14; 95% CI: 0.87-1.50), fasting plasma glucose (ETD = 0.09; 95% CI: -0.19 to 0.36) and body weight loss (ETD = 0.27; 95% CI: -0.36 to 0.91). In terms of time-in-range 70 to 180 mg/dL, weekly insulin was superior to daily insulin (MTD = 3.84; 95% CI: 1.55-6.08). Icodec was associated with higher incidence of all adverse events (odds ratio = 1.20; 95% CI: 1.03-1.48; P = .024), but did not result in high risk of serious and severe adverse events. Moreover, icodec and Basal Insulin Fc did not result in higher incidence of hypoglycemia compared with insulin daily.ConclusionOur meta-analysis found that insulin weekly was well tolerated and effective for glycemic control. Once-weekly insulin was not inferior to once-daily insulin in both efficacy and safety in T2D.Copyright © 2023 the Author(s). Published by Wolters Kluwer Health, Inc.

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