| Variable name | Variable description | Mean | Standard deviation | Minimum | Maximum |
|---|---|---|---|---|---|
| Death_30 | Death_30 is a binary indicator that equals 1 if the patient died within 30-days of being admitted with an AMI | 0.1369 | 0.3437 | 0 | 1 |
| Age | Age is the age of the patient | 71.4371 | 12.8655 | 40 | 99 |
| Female | Female is an indicator that equals 1 if the patient’s gender is female | 0.3813 | 0.4857 | 0 | 1 |
| IMD_Income_2007 | IMD_Income_2007 is score of 1–5 based on the income component of the 2007 index of multipledeprivations. | 3.1607 | 1.3982 | 1 | 6 |
| Tradiditional_NHS* | Traditional_NHS is an indicator that equals 1 if the hospital where the patient received care is not a foundation trust or teaching hospital | 0.7239 | 0.4471 | 0 | 1 |
| Teaching* | Teaching is an indicator variable that equals 1 if the hospital where the patient is treated is a teachinghospital | 0.1458 | 0.3529 | 0 | 1 |
| FT* | FT is an indicator variable that equals 1 if the hospital where the patient is treated is a foundation trust | 0.1605 | 0.3671 | 0 | 1 |
| Charlson_Score | The Charlson comorbidity score is an index ranging from 0 to 6, based on the patient’s co-morbidities. Six is the most severe. | 1.7047 | 1.0543 | 0 | 12 |
| Angioplasty | Angioplasty is an indicator variable that equals 1 if the patient underwent an angioplasty during his/her admission | 0.0543 | 0.2267 | 0 | 1 |
| Negloghhi 30 km | Negloghhi30 km is the negative log of the HHI measured using a fixed radius that is centred on each GP practice and averaged across 2002 to 2005 | 1.4768 | 0.9186 | 0 | 3.6085 |
| Negloghhi 30 band | Negloghhi30band is the negative log of the HHI measured using a variable radius that is defined by the 30-min travel time surrounding each GP practice and averaged across 2002 to 2005 | 1.2526 | 0.8141 | 0 | 3.2266 |
| Negloghhi 95 | Negloghhi95 is the negative log of the HHI measured using a variable radius that captures the 95th percentile of travel for each GP practice | 0.7349 | 0.5561 | 0 | 3.728348 |
| Neglohhhi 20 | Negloghhhi20 is the negative log of the HHI measured using a fixed radius of 20 km drawn around each hospital and averaged across 2002 to 2005 | 1.0069 | 0.9292 | 0 | 3.3369 |
| Log G_Count_30mins | Log G_Count_30Band is the logged count of hospitals within a variable radius that captures a 30-min travel time surrounding each GP practice and averaged across 2002 to 2005 | 1.5651 | 0.8600 | 0.0000 | 3.4657 |
| Log G_Count_30km | Log G_Count_30 km is the logged count of hospitals within a fixed radius that extends 30 km around each GP practice | 1.7806 | 0.9723 | 0.0000 | 3.8501 |
| Log G_Count_95sh | Log G_Count_95 is the logged count of the hospitals within a radius defined by the distance that captures the 95th percentile of travel for each GP practice and averaged across 2002 to 2005 | 1.3985 | 0.7113 | 0.0000 | 3.7992 |
| Distance | Distance is the straight-line distance that each patient travelled for care measured in kilometres | 13.3152 | 28.4493 | 0.0000 | 607.5968 |
| Site Activity | The number of heart attack patients each hospital treats annually. | 483.9835 | 233.7503 | 100 | 1,312 |
*
The cumulative sum of Traditional NHS, FT and Teaching is greater than 1.00 because hospitals can be both teaching hospitals and foundation trusts. Observations are limited to patients between 39 and 100 years of age with a length of stay greater than two days, treated at sites that treated more than 25 AMIs per year. Unlike the regressions that we present, we do not limit the distance that patients travelled for care. AMI, acute myocardial infarction; NHS, National Health Service; FT, foundation trust; HHI, Herfindahl-Hirschman Indexes.