Table 1.

Characteristics of studied patients^*

Variable	Total	Ischemia/MI n (%)	Nonischemia/MI n (%)	P-value
	N = 114	19 (17)	95 (83)
Mean age (SD) in years	72.5 (10)	74.9 (10)	72.1 (10)	0.27
Gender
Female	67	12 (18)	55 (82)
Male	47	7 (15)	40 (85)	0.67
Race
White	80 (70)	14 (18)	66 (83)
Nonwhite	34 (30)	5 (15)	29 (85)	0.71
Mean number of coronary artery disease risk factors	4.1	4.2	4.1	0.67
Comorbidities
Number of comorbidities	4.3	4.4	4.2	0.67
Diabetes mellitus	27	6 (78)	21 (22)	0.38
Hypertension	66	9 (14)	57 (86)	0.31
Obesity	50	11 (22)	39 (78)	0.18
Coronary artery disease	22	4 (18)	18 (82)	0.83
Hypercholesterolemia	28	4 (14)	24 (86)	0.70
Vital signs
Heart rate on admission (beats/min)	94	93	95	0.77
Respiratory rate (breaths/min)	23	25	23	0.10
Systolic blood pressure on admission (mmhg)	137	141	136	0.49
Diastolic blood pressure on admission (mmhg)	79	79	79	0.96
Creatinine (mg/dL)	0.95	1.19	0.90	0.01**
Cumulative albuterol (mg)	14.3	15.1	14.1	0.72
Hospital length of stay (d)	7.6	6.3	7.8	0.60

Notes:

^*All patients had a positive smoking history.

^**P < 0.05.

Abbreviations: SD, standard deviation.