Impact of SARS-CoV-2 on Progression of Glycemic and Cardiometabolic Variables and Changes in Insulin Indices: A Longitudinal Study

We aimed to evaluate whether SARS-CoV-2 infection is associated with beta cell dysfunction and progression of glycemic and cardiometabolic variables in an established cohort. Study participants (n = 352, 46.9% men) underwent a detailed evaluation at two time points: (a) pre-COVID (2016–19) and (b) peri-COVID (2020–21). At the second visit, SARS-CoV-2 infection was determined on the basis of a quantitative S1/S2 IgG antibody test (DiaSorin Liaison) and/or a documented history of infection. A total of 159 (45.2%) participants were seropositive for SARS-CoV-2, of whom 122 (76.7%) had mild/asymptomatic infection. Progression in body mass index (BMI) category [34 (21.4%) vs. 22 (11.4%), p = 0.011] was seen in a significantly higher proportion of the participants in the infected group compared to the non-infected group. Progression in glycemic and insulin indices [homeostasis model assessment of insulin resistance (HOMA-IR), Matsuda index, and oral disposition index (oDI)] categories was also evident in a larger proportion of participants in the infected group; however, the difference was not statistically significant. On logistic regression analysis, the association between SARS-CoV-2 infection and BMI category progression was statistically significant [fully adjusted OR 2.14 (95% CI, 1.18–3.90; p = 0.013)]. In this longitudinal study, predominant mild/asymptomatic SARS-CoV-2 infection was associated with increase in BMI, but not with worsening of beta cell function and insulin resistance, nor glycemic progression.