Longer pre-hospital delay in first myocardial infarction among patients with diabetes: an analysis of 4266 patients in the Northern Sweden MONICA Study

Table 1 Clinical characteristics of patients with myocardial infarction

	Patients with diabetes			Patients without diabetes
Characteristics	Men	Women	Total	Men	Women	Total
	n =486	n =233	n =719	n =2522	n =1025	n =3547	p ¹	p ²	p ³	p ⁴
Age years, mean (SD)	62.8 (7.9)	65.1 (7.7)	63.5 (7.9)	61.3 (8.7)	63.1 (9.0)	61.8 (8.8)	p<0.001	p<0.001	p<0.001	p=0.001
Sex
Female (%)			32.4			28.9	p=0.060
Male (%)			67.6			71.1
Symptoms ^*
-Typical (%)	92.0	91.7	91.9	93.2	90.0	92.2	p=0.8	P=0.9	p=0.4	p=0.5
Medical history/Risk factors ^*
-Previous IHD (%)	39.2	43.9	40.8	25.7	27.4	26.2	p<0.001	p=0.2	p<0.001	p<0.001
-Hypertension (%)	59.9	70.2	63.3	34,7	48.9	38.7	p<0.001	p=0.008	p<0.001	p<0.001
-Smoking (%)	27.2	34.2	29.3	31.4	46.9	35.7	p=0.004	p=0.1	p=0.1	p=0.003
Size of residential area ^**
-City (%)	34.4	33.9	34.2	37.2	40.8	38.3
-Town (%)	32.7	38.2	34.5	31.9	31.3	31.7	p=0.1	p=0.3	p=0.5	p=0.081
-Rural area (%)	32.9	27.9	31.3	30.8	27.9	30.0

p ¹: Comparison between patients with and without diabetes, p ²: Comparison between men and women with diabetes, p ³: Comparison between men with and without diabetes, p ⁴: Comparison between women with and without diabetes.
*Missing data: Symptoms 5.2%, previous IHD 1%, hypertension 1.6%, smoking 18%.
**Rural area < 1 000 inhabitants, town 1 000–15 000 inhabitants, City > 15 000 inhabitants.

ISSN: 1471-2261