Association Between the Chinese Visceral Adiposity Index and Obstructive Sleep Apnoea in Hypertensive Patients with Normal-Weight: A Cross-Sectional Study
Bibliographic record
Abstract
Delian Zhang,1– 5,* Kangxin Cai,1– 5,* Qing Zhu,1– 5 Aliye Abulaiti,1– 5 Jing Hong,1– 5 Yingchun Wang,1– 5 Nanfang Li1– 5 1Hypertension Center of People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, 830001, People’s Republic of China; 2Xinjiang Hypertension Institute, Urumqi, Xinjiang, 830001, People’s Republic of China; 3NHC Key Laboratory of Hypertension Clinical Research, Urumqi, Xinjiang, 830001, People’s Republic of China; 4Key Laboratory of Xinjiang Uygur Autonomous Region, Xinjiang, People’s Republic of China; 5Hypertension Research Laboratory, Xinjiang Clinical Medical Research Center for Hypertension (Cardio-Cerebrovascular) Diseases, Urumqi, People’s Republic of China*These authors contributed equally to this workCorrespondence: Nanfang Li, Hypertension Center of People’s Hospital of Xinjiang Uygur Autonomous Region, No. 91 Tianchi Road, Urumqi, Xinjiang, 830001, People’s Republic of China, Tel +86 8564818, Email lnanfang2016@sina.comObjective: Previous studies have mainly focused on the relationship between the Chinese Visceral Adiposity Index (CVAI) and obstructive sleep apnea (OSA) in general or overweight/obese populations. However, normal-weight hypertensive patients represent a clinically relevant yet understudied group, in whom OSA risk may be underestimated due to the absence of overt obesity. This study aimed to investigate the association between CVAI and OSA in normal-weight patients with hypertension, given the important role of visceral adiposity in the pathogenesis of OSA.Materials and Methods: In this cross-sectional study, hypertensive patients admitted between January 1, 2021, and December 31, 2023, were enrolled. Multivariate logistic and linear regression analyses were conducted. Additionally, restricted cubic spline (RCS) analyses were used to examine potential dose–response relationships.Results: A total of 6659 hypertensive patients were included. After adjusting for potential confounders, elevated CVAI levels were significantly associated with an increased risk and severity of OSA. RCS analyses demonstrated a clear linear dose–response relationship between CVAI and both the presence of OSA and apnea–hypopnea index (AHI) levels. These results were robust across both subgroup and sensitivity analyses.Conclusion: Our study results indicate that CVAI is associated with the occurrence and severity of OSA in hypertensive patients with normal body weight. Further research is needed to confirm these findings.Keywords: Chinese visceral adiposity index, obstructive sleep apnoea, apnoea-hypopnea index, cross-sectional study
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".