Table 1.

Summary of studies investigating new-onset diabetes mellitus after COVID-19 recovery.

Reference	Country	Study Type	Sample Size	Follow-Up Timeframe	Results
Montefusco, L. et al. [9]	Italy	Retrospective observational cohort study	551	Six months	Among 151 patients who exhibited new-onset hyperglycaemia at hospital admission for COVID-19, persistent hyperglycaemia continued to be observed in 52 (35%) patients, overt diabetes was diagnosed in about 2% of patients and the remaining 63% of patients showed remission and became normoglycemic.
Chen, M.et al. [10]	China	Prospective study	64	Three and six months	Fasting C-peptide [mmol/L] Mean ± SD Baseline 0.35 ± 0.24; 3-month follow-up 2.36 ± 0.98; 6-month follow-up 2.52 ± 1.11; p-value < 0.001. Fasting blood glucose [mmol/L] Mean ± SD Baseline 5.84 ± 1.21; 3-month follow-up 4.95 ± 0.76; 6-month follow-up 5.40 ± 0.68; p-value < 0.003.
Nesan, G. et al. [11]	India	Longitudinal study	354	Three months	Ten newly diagnosed with diabetes mellitus: six (66.6%) females and three (33.3%) males; p = 0.002.
Ayoubkhani, D. et al. [12]	England	Retrospective cohort study	47,780	Five months	Rate of new-onset diabetes was raised in post-COVID patients with 29 diagnoses per 1000 patient-years.
Huang, C. et al. [13]	China	Ambidirectional cohort study	1733	Six months	Fifty-eight patients without a self-reported history of diabetes were newly diagnosed with the condition at follow-up.

COVID-19, coronavirus disease 2019; mmol/L, millimoles per litre; p, p-value; SD, Standard Deviation.