Exercise-provoked esophageal motility disorder in patients with recurrent chest pain

Table 3 Proportional hazard Cox regression model for the number of days to first hospitalization because of suspected acute coronary syndrome (χ² = 32.38, P = 0.039)

Independent variable	β	Standard error	P
Number of hospitalizations before gastrological diagnostic performance	0.01	0.06	0.87
Spontaneous chest pain during 24-h monitoring	1.05	0.56	0.06
Eradicative treatment recommendation due to Helicobacter pylori infection	-1.36	0.62	0.03
EPES	-2.38	0.93	0.01
epGER	-0.012	1.01	0.99
Significant (> 50%) coronary vessel narrowing	1.01	0.73	0.17
History of myocardial revascularization	-0.78	0.67	0.24
DUKE score	0.03	0.06	0.62
Gender (male/female)	-1.42	0.72	0.049
Smoking	0.06	1.38	0.96
Canadian Cardiovascular Society Classification	0.74	0.76	0.33
History of myocardial infarction	0.30	0.99	0.76
Hypertension	-0.47	0.96	0.63
Diabetes mellitus	-0.22	0.80	0.78
Age	0.085	0.04	0.047
BMI	0.10	0.09	0.27
WHR	-4.69	5.07	0.35
Fasting blood glucose	-0.074	0.05	0.11
LDL cholesterol	-0.015	0.01	0.18
Triglycerides	0.005	0.04	0.277

BMI: Body mass index; WHR: Waist to hip ratio; epGER: Exercise- provoked gastroesophageal reflux; EPES: Exercise-provoked esophageal spasm; LDL: Low-density lipoprotein; DUKE score = Duration of stress test according to Bruce protocol (min) - [5 × ST interval depression (mm)] - (4 × treadmill angina index).