Journals / Osmangazi Tıp Dergisi / 2026 / Cilt: 48 Sayı: 5

Determinants of Insulin Resistance Beyond Adiposity: A Multivariable Analysis in Normal-Weight Adults

Adipozite Dışındaki İnsülin Direnci Belirleyicileri: Normal Ağırlıktaki Yetişkinlerde Çok Değişkenli Bir Analiz

Aycan Acet(KUTAHYA HEALTH SCIENCES UNIVERSITY)0000-0002-9395-3366
Türkan Paşalı Kilit(KUTAHYA HEALTH SCIENCES UNIVERSITY)0000-0003-1126-7336
Sertaş Erarslan(KUTAHYA HEALTH SCIENCES UNIVERSITY)0000-0002-6816-4154
Cumali Yalçın(Kütahya Sağlık Bilimleri Üniversitesi)0000-0002-5129-2977
Can Özlü(Kütahya Sağlık Bilimleri Üniversitesi)0000-0002-9573-1177
Çağla Özdemir(Kütahya Sağlık Bilimleri Üniversitesi)0000-0002-9766-1918
Pages
846–856
Publication Date
2026-08-26
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

WBC count serves as a practical marker for early metabolic risk identification in non-obese individuals.

📌 3 Key Takeaways

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Objective & Hypothesis:Insulin resistance (IR) is a key pathogenic mechanism in Type 2 Diabetes Mellitus, often linked to obesity-related inflammation.
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Key Findings & Data:This retrospective cross-sectional study included 305 normal-weight adults (body mass index < 25 kg/m²).
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Conclusion & Impact:WBC count serves as a practical marker for early metabolic risk identification in non-obese individuals.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:: İnsülin direnci · Beyaz kan hücresi sayısı · Enflamasyon

Abstract

Insulin resistance (IR) is a key pathogenic mechanism in Type 2 Diabetes Mellitus, often linked to obesity-related inflammation. However, IR can also occur in individuals with normal weight, a condition known as the metabolically obese normal-weight phenotype. This study assesses the predictive value of routine hematological parameters compared to combined inflammation indices for detecting IR in non-obese populations. This retrospective cross-sectional study included 305 normal-weight adults (body mass index < 25 kg/m²). IR was defined by a Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) threshold of 2.5. Parameters were analyzed using univariate and hierarchical multivariable logistic regression. Parallel models, adjusted for age, sex, and body mass index (BMI), were used to assess individual leukocyte subtypes. Discriminatory performance was evaluated through Receiver Operating Characteristic (ROC) curve analysis. IR was found in 93 (30.5%) participants. The IR+ group exhibited significantly higher BMI, glucose, triglycerides, HbA1c, and white blood cell (WBC) counts (p < 0.05). Multivariable analysis identified WBC count as the only independent predictor of inflammation (OR = 1.946, p < 0.001). WBC count showed better explanatory power (Nagelkerke R2 = 0.196) and discriminatory ability (AUC = 0.725) compared to individual subtypes and composite indices, like the panimmune inflammation value (AUC = 0.510). The final multivariable model achieved an AUC of 0.736. In normal-weight adults, IR appears to exhibit a more pronounced association with generalized systemic inflammation reflected by absolute WBC counts rather than ratio-based indices. WBC count serves as a practical marker for early metabolic risk identification in non-obese individuals.

Özet

İnsülin direnci (IR), Tip 2 diabetes mellitusun patogenezinin merkezinde bulunan önemli bir mekanizmadır ve genellikle obeziteye bağlı inflamasyonla bağlantılıdır. Ancak IR, normal kilolu bireylerde de görülebilir; bu durum metabolik obez normal kilolu fenotipi olarak bilinir. Bu çalışmanın amacı, obez olmayan popülasyonlarda IR'yi tespit etmek için rutin hematolojik parametrelerin, kombine inflamasyon indekslerine kıyasla öngörü değerini belirlemektir. Bu retrospektif kesitsel çalışmaya 305 normal kilolu yetişkin (vücut kitle indeksi < 25 kg/m²) dahil edildi. Çalışmada IR için kesim değeri olarak 2,5 kullanılmıştır. Parametreler, tek değişkenli ve hiyerarşik çok değişkenli lojistik regresyon kullanılarak analiz edildi. Yaş, cinsiyet ve vücut kitle indeksi (VKİ) için ayarlanmış paralel modeller, bireysel lökosit alt tiplerini değerlendirmek için kullanıldı. Ayırt edici performans, alıcı çalışma karakteristiği (ROC) eğrisi analizi ile değerlendirildi. IR, 93 (%30,5) katılımcıda saptandı. IR olan grupta, VKİ, glikoz, trigliseritler, HbA1c ve beyaz kan hücresi (WBC) sayılarında anlamlı olarak daha yüksek değerler saptandı (p < 0,05). Çok değişkenli analizde, WBC sayısı inflamasyonun tek bağımsız belirleyicisi olarak saptandı (OR = 1,946, p < 0,001). WBC sayısı, panimmün inflamasyon değeri (AUC = 0,510) gibi bireysel alt tiplere ve bileşik indekslere kıyasla daha iyi açıklayıcı güç (Nagelkerke R2 = 0,196) ve ayırt edici performans (AUC = 0,725) gösterdi. Nihai çok değişkenli model 0,736 AUC değerine ulaştı. Normal kilolu yetişkinlerde, IR, oran bazlı indekslerden ziyade mutlak WBC sayılarının yansıttığı genel sistemik inflamasyon ile daha belirgin bir ilişki sergilemektedir. WBC sayısının günlük pratikte obez olmayan bireylerde erken metabolik risk tanımlaması için ucuz, pratik bir biyobelirteç olarak akılda tutulması faydalı bir yaklaşımdır.

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Cite This Article

Acet, A., Kilit, T. P., Erarslan, S., Yalçın, C., Özlü, C., Özdemir, Ç., *, A. A. (2026). Determinants of Insulin Resistance Beyond Adiposity: A Multivariable Analysis in Normal-Weight Adults. Osmangazi Tıp Dergisi, Cilt: 48 Sayı: 5, 846–856. https://doi.org/10.20515/otd.1862199

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