Background: The relationship of insulin resistance with bone mineral density (BMD) remains unclear, offering an opportunity for novel indices to shed light on the matter. The aim of this review was to evaluate the association between surrogate indices of insulin resistance and BMD.Methods: A systematic review was conducted to evaluate observational studies that examined the relationship between insulin resistance surrogate indices and BMD in adults. Databases including PubMed, Web of Science, Scopus, and Embase were searched. Quality assessment was performed using Joanna Briggs Institute (JBI) critical appraisal tools.Results: This systematic review included 27 cohorts and cross-sectional studies with 71,525 participants to assess the potential link between insulin resistance surrogate indices like HOMA-IR, HOMA-β, TyG, TyG-BMI, TyG-WtHR, and TyG-WC, along with METS-IR, and VAI, and BMD at various sites. There seems to be no link between BMD and the HOMA index, despite being extensively studied in various studies (adjusted β ranging from -0.49 to 0.103). Most literature suggests that a higher TyG index is associated with decreased BMD levels (adjusted β ranging from -0.085 to 0.0124). Despite limited evidence, other insulin resistance indices such as VAI (adjusted β ranging from 0.007 to 0.016), TyG-BMI (adjusted β ranging from 0.002 to 0.415), METS-IR (adjusted β ranging from 0.005 to 0.060), TyG-WtHR (β = 0.012) and TyG-WC (β = 0.0001) have shown a positive association with BMD in a few studies.Conclusion: This systematic review emphasizes the intricate connection between insulin resistance and BMD. The lack of ability to perform a meta-analysis and the dependence on cross-sectional studies hinder the robustness of the findings, hence necessitating well-designed longitudinal studies.Systematic review registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42024512770.

Metabolic syndrome (MetS) is a multifactorial condition linked to increased risk of cardiovascular disease and type 2 diabetes. The Single-Point Insulin Sensitivity Estimator (SPISE), a non-invasive index calculated via 600 × HDL-C^0.185 / (TG^0.2 × BMI^1.338), offers a practical alternative. This systematic review and meta-analysis aim to evaluate the accuracy of SPISE as an indicator for MetS. We conducted a systematic review and meta-analysis following PRISMA guidelines. We searched databases such as MEDLINE, Scopus, Web of Science, and Embase, focusing on studies evaluating SPISE's screening accuracy for MetS. Eligible studies were observational, reporting mean SPISE values and its predictive performance. Meta-analyses were performed using Hedges' g standardized mean differences (SMD) and pooled area under the curve (AUC) estimates. Seven studies comprising 12,919 participants were included, with an age range of 9.2 ± 2.1 to 52.4 ± 11.0. Individuals with MetS had significantly lower SPISE scores than controls (SMD = -0.94, 95% CI: -1.25 to -0.63). The pooled AUC for SPISE as a predictor of MetS was 0.86 (95% CI: 0.83 to 0.90), surpassing other insulin resistance indices like HOMA-IR and the triglyceride/HDL-C ratio. Meta-regression showed that systolic and diastolic blood pressure were potential sources of heterogeneity and age, gender, BMI, waist circumference, fasting blood glucose, triglyceride, and HDL did not contribute to heterogeneity. SPISE is a highly accurate and non-invasive tool for predicting MetS, potentially outperforming traditional indices like HOMA-IR. Its ease of use and precision make it a valuable clinical screening tool, especially in diverse populations.

Hepatic liver cirrhosis can lead to significant systemic complications, including the deterioration of bone health. The resulting bone complications can contribute to a decreased quality of life and increased healthcare burden. This study aimed to systematically review and analyze the risk of osteoporosis, fracture, and changes in bone mineral density (BMD) among patients with hepatic cirrhosis compared to non-cirrhotic healthy controls. Adhering to PRISMA guidelines, studies were sourced from MEDLINE/PubMed, Scopus, Web of Science, and Embase up to July 2024, including observational studies that assessed osteoporosis, fracture, and BMD in cirrhotic versus non-cirrhotic patients. Meta-analyses were performed by calculating odds ratios (OR) and standardized mean differences (SMD) of outcomes. Sensitivity analyses and meta-regression were also conducted to explore the robustness and sources of heterogeneity. The analysis included 21 studies with 76,521 cirrhotic and 695,330 control patients. Cirrhotic patients demonstrated significantly higher odds of osteoporosis (OR = 1.93 [1.84 to 2.03]). Fracture was notably elevated, with cirrhotic patients showing an OR of 2.30 [1.66 to 3.18]. Reductions in BMD were observed in both the lumbar spine (SMD = -0.57[-0.79 to -0.35]) and femoral neck (SMD = -0.41 [-0.71 to -0.12]). Sensitivity analyses confirmed these findings, and meta-regression highlighted that male prevalence impacted these associations in various ways. Patients with hepatic cirrhosis are at heightened risk for osteoporosis and fractures, underlining the need for proactive screening and preventive strategies. Integrating cirrhosis into current fracture-risk models could enhance the assessment and management of bone health in these patients.

Studies on the burden and epidemiological aspects of substance-use disorders in the Middle East and North Africa (MENA) are limited. To evaluate the burden and epidemiology of substance-use disorders in MENA countries during 1990-2019. Ecological study. Data from the global burden of disease study were used in the current study. The incidence, prevalence, mortality, years of life lost from mortality, years of healthy life lost due to disability, and disability-adjusted life years (DALY) rates attributable to each group of disorders across age groups, genders, years, and countries were retrieved along with their corresponding age-standardized values. Age-standardized DALYs rates of alcohol-use disorders, drug-use disorders, and substanceuse disorders associated with sociodemographic index across MENA countries and over 30 years were examined. The age-standardized DALY rate of substance-use disorders in MENA had risen from 190.1 in 1990 to 234.93 per 100,000 in 2019, indicating a 23.57% increase. In both genders, the DALY rate was highest in the 25-29-years age group in 2019 (440.81 per 100,000 in females and 645.97 per 100,000 in males). In addition, in 2019, age-standardized DALY rates of alcohol-use disorder were the highest in the United Arab Emirates (77.08 per 100,000), Afghanistan (67.77 per 100,000), and Bahrain (60.35 per 100,000). In almost all these countries, opioid-use disorder had the highest age-standardized DALY rate in 2019. The burden of substance-use disorders has increased from 1990 to 2019 in the MENA region in contrast to the global trend. This study findings highlight that the current interventions and laws implemented in this region to address drug trafficking and substance-use disorders may be insufficient and ineffective, warranting further international collaboration and implementation of more effective strategies to reduce the overall burden of substance-use disorders.

Erectile dysfunction (ED) has been linked to insulin resistance (IR), with various surrogate indices being used to assess this association. This systematic review and meta-analysis aimed to evaluate the relationship between IR indices and the incidence and severity of ED. A comprehensive search across PubMed, Embase, Web of Science, and Scopus was carried out. Required data were extracted and meta-analyzed. The Newcastle–Ottawa Scale (NOS) was employed to evaluate the studies' risk of bias. Sensitivity analyses and meta-regressions were conducted to explore heterogeneity and the impact of confounding variables. Seventeen studies with a total of 3810 patients with ED and 8252 without ED were included. Meta-analysis revealed that males with ED had significantly higher levels of Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) (SMD = 0.59, 95% CI [0.15, 1.03], I2 = 82%, P < 0.01), Triglyceride-Glucose Index (TyG) (SMD = 0.53, 95% CI [0.31, 0.75], I2 = 69%, P < 0.01), and Visceral Adiposity Index (VAI) (SMD = 0.45, 95% CI [0.25, 0.64], I2 = 76%, P < 0.01) compared to those without ED. However, there was no significant correlation between a one-unit increase in HOMA-IR (OR = 0.63, 95% CI [0.03, 13.69], I2 = 91%, P = 0.77) or TyG (OR = 0.53, 95% CI [0.02, 11.53], I2 = 88%, P = 0.68) and the odds of ED. Additionally, a one-unit increase in VAI was associated with more severe ED (SMD = 0.34, 95% CI [0.03, 0.64], I2 = 16%, P = 0.03). The diagnostic accuracy of these indices varied. The results indicate a significant connection between insulin resistance and erectile dysfunction, as shown by HOMA-IR, TyG, and VAI. Yet, their usefulness in predicting ED is restricted because of significant differences and inconsistencies in diagnostic precision. More research is required to determine the clinical importance of these indices in treating ED.