《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2023, Vol. 29 ›› Issue (10): 1214-1220.doi: 10.3969/j.issn.1006-9771.2023.10.014

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Association of serum 25-hydroxy vitamin D with the occurrence and outcome of stroke-associated pneumonia in patients in emergency ward

LIU Huizhen1,2a, SHANG Na1,2a, LI Junyu1,2a, WANG Na1,2a, LI Fang1,2b, LIU Xiaomeng1,2a, GUO Shubin3()   

  1. 1. Capital Medical University School of Rehabilitation Medicine, Beijing 100068, China
    2a. Department of Emergency Medicine; b. Department of Neurology, Beijing Bo'ai Hospital, China Rehabilitation Research Center, Beijing 100068, China
    3. Emergency Medicine Clinical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation, Beijing 100020, China
  • Received:2023-01-30 Revised:2023-06-20 Published:2023-10-25 Online:2023-11-16
  • Contact: GUO Shubin, E-mail: shubin007@yeah.net
  • Supported by:
    Youth Foundation of China Rehabilitation Research Center(2018zx-Q6);Open Project of Beijing Key Laboratory of Cardiopulmonary Cerebral Resuscitation(2020XFN-KFKT-01)

Abstract:

Objective To investigate the association between serum 25-hydroxy vitamin D [25(OH)D] and the occurrence and outcome of stroke-associated pneumonia (SAP) in patients with acute ischemic stroke (AIS) in emergency ward.
Methods The clinical data of 256 patients with AIS from January, 2019 to December, 2021 were collected in the emergency department of Beijing Bo'ai Hospital. Blood routine, biochemical indicators and serum concentration of 25(OH)D were detected within 24 hours after enrollment; meanwhile, National Institute of Health Stroke Scale (NIHSS) and A2DS2 score were evaluated. The patients were divided into non-SAP group (n = 164) and SAP group (n = 92) according to whether pneumonia occurred during hospitalization. Multivariable logistic regression model was used to analyze the influencing factors of SAP. The predictive ability of serum 25(OH)D and A2DS2 for SAP were evaluated by receiver operating characteristic (ROC) curves. The 28-day survival of patients with SAP was followed up. Multivariable Cox proportional hazard regression model was used to investigate the association between vitamin D nutritional status and 28-day all-cause mortality.
Results Serum 25(OH)D was significantly lower in the SAP group than that in the non-SAP group (Z = 6.896, P < 0.001). After adjusting age, sex, infarct volume, A2DS2 score and other factors, lower serum 25(OH)D level (OR = 0.934, 95%CI 0.884 to 0.986, P = 0.014) was an independent risk factor for SAP. The areas under curve (95%CI) of serum 25(OH)D, A2DS2 score and their combined model for predicting SAP were 0.774 (0.718 to 0.824), 0.832 (0.781 to 0.876) and 0.851 (0.802 to 0.893) (P < 0.001), respectively; and the optimum cut-off values were 25(OH)D < 10.2 ng/mL, A2DS2 score > 5 points, combined prediction > 0.207, and the Youden index were 0.493, 0.662 and 0.616, respectively. A2DS2 score could improve the prediction efficiency of serum 25(OH)D (Z = 2.106, P = 0.035). After adjusting age, sex, infarct volume and NIHSS score, vitamin D deficiency was an independent risk factor for all-cause mortality after 28 days of SAP (HR = 2.871, 95%CI 1.004 to 8.208, P = 0.049).
Conclusion Serum 25(OH)D is independently associated with the occurrence and outcome of SAP in patients with AIS in emergency ward, which could serve as an independent predictor for SAP.

Key words: stroke, stroke-associated pneumonia, 25-hydroxy vitamin D, outcome

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