Associated factors Definition All patients
(n° 409)
HC
(n° 63)
Controls
(n° 346)
p
Age (median ± SD)     72.9 ± 13.17 68.9 ± 14.8 0.02
Gender
Male
Female
  60.9%
39.1%
60.3%
39.7%
61%
39%
0.70
Admission diagnosis
Elective surgery-planned ICU admission
Elective surgery-unplanned ICU admission
Surgical emergency
Medical
47.4%
4.1%
18.6%
29.8%
33.3%
7.9%
22.2%
36.5%
53.8%
3.7%
17.9%
24.6%
0.001
SAPS II score (median ± SD)     32 ± 16.4 36.4
± 14.9
0.05
Cigarette smoking > 40 packs year 0.03% 17.5% 0.3% 0.001
Cancer Neoplastic lesion, with or without metastasis,
treated or untreated
39.4% 52.4% 37% 0.021
Vasculopathy Claudicatio intermittens, arterial bypass,
vascular gangrene, arterial insufficiency,
untreated chest or abdominal aortic aneurysm
29.1% 39.7% 27.7% 0.044
Coronary artery disease Stress test or pharmacological inducible
chest pain, history
of Acute Myocardial Infarction/angina
8% 15.9% 6.6% 0.049
Chronic atrial fibrillation Chronic Atrial Fibrillation 11.7% 19% 10.4% 0.050
Hypertension SBP>140 and/or DBP>90 51.3% 66.7% 48.5% 0.068
PTCA/CABG   5.3% 6.3% 2.3% 0.081
Chronic Renal Failure Creatinine clearance less than 90 ml/min/m2 8.8% 11.1% 8.4% 0.095
Chronic liver failure Hepatitis for more than three months, with or without
presence of cirrhosis or its complications
6.6% 7.9% 6.4% 0.23
OSAS (Obstructive Sleep Apnea Syndrome)   0.7% 1.6% 0.6% 0.38
DM (Diabetes Mellitus) ADO or insulin therapy or diabetes-related complications 23.2% 30.2% 22% 0.48
Myocardial infarction   14.1% 9.5% 15% 0.44
Stroke/TIA   3% 8% 2% 0.49
Heart Failure Progressive dyspnea, according to NYHA classes 13.4% 7.9% 14.4% 0.83
COPD Progressive dyspnea, with or without specific
therapy, with or without home oxygen therapy, with hypoxemia and/or chronic hypercapnia
40% 38.1% 40.5% 0.94
Table 2: Distribution of clinical and behavioral factors in patients with Hypertensive Crises (HC) and controls.