J Neurol Surg A Cent Eur Neurosurg 2017; 78(03): 238-244
DOI: 10.1055/s-0036-1594308
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Effects of Meteorological Variables on the Incidence of Rupture of Intracranial Aneurysms in Central New Jersey

Marissa Kellogg
1   Department of Neurology, Oregon Health and Science University, Portland, Oregon, United States
,
Dimitriy Petrov
2   Department of Neurological Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, United States
,
Nitin Agarwal
3   Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, United States
,
Nitesh V. Patel
4   Deparment of Neurological Surgery, New Jersey Medical School, Newark, New Jersey, United States
,
David Richard Hansberry
5   Department of Radiology, Thomas Jefferson University Hospitals, Philadelphia, Pennsylvania, United States
,
Prateek Agarwal
2   Department of Neurological Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, United States
,
Michael Brimacombe
6   Department of Biostatistics, Kansas University Medical Center, Kansas City, Kansas, United States
,
Chirag D. Gandhi
4   Deparment of Neurological Surgery, New Jersey Medical School, Newark, New Jersey, United States
,
Charles Prestigiacomo
4   Deparment of Neurological Surgery, New Jersey Medical School, Newark, New Jersey, United States
7   Department of Radiology, New Jersey Medical School, Newark, New Jersey, United States
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Publikationsverlauf

27. Februar 2016

09. April 2016

Publikationsdatum:
30. November 2016 (online)

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Abstract

Introduction Previous studies have suggested relationships between the rupture of intracranial aneurysms and meteorological variables such as season, barometric pressure, and temperature. Our objective was to examine the relationship between the incidence of hospital admissions secondary to aneurysmal subarachnoid hemorrhage (aSAH) and meteorological variables in central New Jersey.

Methods The study population consisted of 312 patients who presented to University Hospital in Newark, New Jersey, between January 1, 2003, and December 31, 2008, with aSAH. Days in the 6-year period were classified as nonbleed days (no aSAH), bleed days (one or more aSAHs within 1 calendar day), cluster days (two or more aSAHs within 2 calendar days), and multiple-bleed days (two or more aSAHs within 1 calendar day).

Results The only significant meteorological risk factor for the occurrence of multiple-bleed days was high barometric pressure (1018.5 versus 1016.5 millibars [mbars]; p < 0.04), but an increase in barometric pressure (+ 2.8 mbars) over the 2 days prior to the multiple-bleed day, although not statistically significant, may be a risk factor (p < 0.09). Barometric pressure was also noted to be increased on bleed days (1017.2 versus 1016.5 mbars) and cluster days (1017.7 versus 1016.5 mbars), but this relationship was not significant (p < 0.1 and p < 0.1, respectively). Although aSAH days demonstrated consistently lower temperatures than non-aSAH days and dropping temperatures were consistently found in the days preceding the aSAH, these relationships were not significant.

Conclusion Among meteorological factors, high barometric pressure and low temperature may be risk factors for the onset of aSAH.