Table 2.

Baseline demographic, clinical, and selected characteristics of acute myocardial infarction cases from the Strong Heart Study (N=72)

Characteristic	n	Proportion	Range	Mean	Median
Sex (female)	38	53%
Age at time of AMI	72		56 to 87 years	69 years	67 years
Medicare insurance	43	60%
Medicare or Medicaid insurance	48	67%
Private insurance	13	18%
Indian Health Service only	7	12%
Current smoker^*	28	39%
Body mass index (kg/m²)^*	71		21.3–45.6	31.1	30.5
Serum creatinine (mg/dl)^*	71		.60–1.6	.91	.87
Hypertension^†	52	72%
Diabetes^†	53	74%
Previous AMI^‡	17	24%
Previous cardiovascular diseases^§	24	33%
Time from onset of symptoms to first recorded medical care (minutes)	45		10–2918	410	159
Time to transfer from PCC to TCC^∥ (minutes)	50		20–4121	504	249
Travel time from PCC to TCC^¶ (minutes)	46		10–314	94	77

Derived from SHS data collected from 1989–1992.

^†

Any instance of hypertension or diabetes in SHS data collected from 1989–1999.

^‡

Any instance of definite MI occurring between 1989 and MI ascertained for this study.

^§

Any instance of definite MI, coronary heart disease or stroke occurring between 1989 and MI ascertained for this study.

^∥

Time from admission at first facility to admission at second facility; PCC, primary care centers; TCC, tertiary care centers.

^¶

Transit time enroute between first facility and second facility.