In a groundbreaking study published in ‘Biomolecules & Biomedicine,’ researchers have presented compelling evidence associating prediabetes with a greater incidence of Parkinson’s disease (PD). This meta-analysis illuminates the potential risks posed by prediabetes, a condition characterized by blood glucose levels that are higher than normal but not yet high enough to be diagnosed as diabetes.

The study’s DOI is 10.17305/bb.2023.10035, marking it as a significant contribution to the ongoing discussion surrounding noncommunicable chronic diseases and their impact on neurological health.

The team, led by Principal Investigator Jin Xiaojie X from the Department of Neurology at Tianjin First Central Hospital, School of Medicine, Nankai University, set out to determine whether prediabetes (PreD) is a factor in the development of PD, in light of established connections between diabetes and a heightened risk of PD. Through a meticulous search of major databases – PubMed, Embase, and Web of Science – the researchers identified relevant longitudinal observational studies for review.

Pooling data from seven different datasets, derived from five cohort studies, they included an astonishing number of over 18 million adult subjects who were free of PD at the baseline of the study. Within this group, 2,432,148 individuals, representing 13.3% of the population, had prediabetes.

Throughout the course of follow-up, a concerning number of 46,682 cases were diagnosed with PD. According to Jin Xiaojie X and colleagues, the pooled analysis revealed a significant connection: subjects with prediabetes faced a 9% increased risk of developing PD (risk ratio [RR] 1.09, 95% confidence interval [CI] 1.02 – 1.16; P = 0.02; I^2 = 52%) compared to those with normal blood sugar levels. Importantly, this relationship persisted even after accounting for confounders such as age, sex, body mass index (BMI), and smoking habits.

The robustness of this association was confirmed as the research team embarked on pilot subgroup analyses, which indicated that the link between prediabetes and PD was not significantly modified by factors including the location of the study, study design, participant demographics, definitions of prediabetes, or quality scores of the study (P for subgroup difference all > 0.05).

What sets this study apart is its large-scale population base and the meticulous adjustment for a wide array of potentially confounding variables. Not only does it highlight the elevated risk facing the prediabetic population, but it also suggests that these findings are broadly applicable regardless of geographical and demographic variances.

The implications of these findings are vital for public health policies and individual healthcare plans. Given that prediabetes is a modifiable condition, these results underline the importance of glucose monitoring and lifestyle intervention to prevent not just diabetes itself, but also related complications that may include neurodegenerative diseases such as PD.

Moreover, the study by Jin Xiaojie X et al. opens new avenues for research into the mechanisms underlying the connection between dysregulated glucose metabolism and neurodegeneration. Understanding these pathways could lead to innovative preventative strategies and therapeutic interventions for PD.


1. Huang W, et al. “Diabetes Mellitus and the Risk of Alzheimer’s Disease: A Systematic Review and Meta-Analysis.” Lancet Neurol, 2021. doi: 10.1016/S1474-4422(20)30367-5.
2. Lu Y, et al. “Insulin Resistance and the Incidence of Parkinson’s Disease: A Cohort Study.” Lancet Diabetes Endocrinol, 2022. doi: 10.1016/S2213-8587(21)00285-9.
3. Gong Z, et al. “Prediabetes, Diabetes, and the Risk of Parkinson’s Disease: A Population-Based, Longitudinal Study.” Mov Disord, 2021. doi: 10.1002/mds.28602.
4. Wang Z, et al. “Association Between Type 2 Diabetes Mellitus and Risk of Parkinson’s Disease: A Meta-Analysis of Cohort Studies.” Diabetes Care, 2023. doi: 10.2337/dc22-2543.
5. Biomol Biomed. “Elevated Hemoglobin A1c Levels and the Risk of Dementia: A Population-Based Study.” Biomolecules & Biomedicine, 2023. doi: 10.17305/bb.2023.10050.


1. Prediabetes Parkinson’s Disease Risk
2. Blood Glucose Levels and Neurodegeneration
3. Type 2 Diabetes Mellitus and PD Incidence
4. Prediabetes Health Outcomes
5. Glucose Monitoring and PD Prevention

These keywords have been chosen to optimize search engine visibility for readers interested in the intersection of metabolic and neurological health, particularly those seeking to understand the impact of prediabetes on conditions like Parkinson’s disease.