Table 2.
Outcome in patients admitted for primary percutaneous coronary intervention
| Number of persons under observation in each group (GEMS/HEMS) | GEMS n (%) | HEMS n (%) | Unadjusted OR (95%CI) | P value | Adjusteda OR (95%CI) | P value | Adjustedb OR (95%CI) | P value | Adjustedc OR (95%CI) | P value | Adjustedd OR (95%CI) | P value | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 30‐day mortality (n = 1604) | 1220/384 | – | – | 76 (6.2) | 19 (5.0) | 0.78 (0.47–1.31) | 0.35 | 0.82 (0.44–1.51) | 0.52 | 0.86 (0.37–1.97) | 0.72 | 0.99 (0.53–1.87) | 0.98 | 1.05 (0.39–2.85) | 0.91 |
| 30‐day mortality in directly referred patients who underwent PCI (n = 920) | 659/261 | – | – | 24 (3.6) | 10 (3.8) | 1.05 (0.50–2.24) | 0.89 | 1.20 (0.52–2.79) | 0.67 | ||||||
| 1‐year mortality (n = 1601) | 1218/383 | – | – | 111 (9.1) | 33 (8.6) | 0.94 (0.63–1.41) | 0.77 | 1.05 (0.66–1.67) | 0.85 | 1.22 0.67–2.21) | 0.80 | 1.04 (0.63–1.71) | 0.89 | 1.60 (0.81–3.12) | 0.17 |
| Reduced work ability 2 years after admission (n = 514) | 401/113 | – | – | 104 (25.9) | 26 (23.0) | 0.85 (0.52–1.40) | 0.53 | 0.91 (0.52–1.60) | 0.75 | 0.66 (0.30–1.46) | 0.30 | 0.90 (0.50–1.61) | 0.72 | 0.88 (0.42–1.85) | 0.74 |
| Over 50% of time on social transfer payments during the first 2 years after admission (n = 514) | 401/113 | – | – | 85 (21.2) | 25 (22.1) | 1.06 (0.64–1.75) | 0.83 | 1.10 (0.64–1.90) | 0.73 | 1.17 (0.61–2.25) | 0.64 | 1.26 (0.72–2.22) | 0.41 | 1.40 (0.66–2.97) | 0.38 |
| Number of persons under observation in each group (GEMS/HEMS) | Number of events | Total PYR | GEMS IR (per 100 PYR) | HEMS IR (per 100 PYR) | Unadjusted IRR (95%CI) | P value | Adjusteda IRR (95%CI) | P value | Adjustedb IIRR (95%CI) | P value | Adjustedc IRR (95%CI) | P value | Adjustedd IRR (95%CI) | P value | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Long‐term mortality ratee (n = 1604) | 1220/384 | 194/66 | 3750/1198 | 5.17 (4.45–5.90) | 5.51 (4.18–6.84) | 0.91 (0.69–1.21) | 0.52 | 1.20 (0.90–1.61) | 0.21 | 0.71 (0.49–1.04) | 0.08 | 0.83 (0.61–1.13) | 0.24 | 0.74 (0.50–1.09) | 0.13 |
| Involuntary early retirement or death (n = 510) | 398/112 | 27/9 | 1170/321 | 2.31 (1.44–3.18) | 2.80 (0.97–4.63) | 0.83 (0.39–1.76) | 0.62 | 1.35 (0.60–3.13) | 0.46 | 0.74 (0.26–2.14) | 0.58 | 0.68 (0.29–1.56) | 0.36 | 1.22 (0.38–3.92) | 0.74 |
| Involuntary early retirement (n = 510) | 398/112 | 11/2 | 1170/321 | 0.94 (0.38–1.50) | 0.62 (0.00–1.50) | 1.53 (0.34–6.92) | 0.58 | 0.68 (0.15–3.23) | 0.63 | 0.84 (0.16–4.37) | 0.84 | 1.10 (0.22–5.42) | 0.90 | 1.21 (0.23–6.38) | 0.83 |
HEMS, helicopter emergency medical services; GEMS, ground emergency medical services; PCI, percutaneous coronary intervention; OR, odds ratio; CI, confidence interval; IR, incidence rate; IRR, incidence rate ratio; PYR, person‐years at risk.
Adjusted for gender, age, resuscitated cardiac arrest, inter‐hospital transfer, acute cardiac failure.
Adjusted for gender, age, resuscitated cardiac arrest, inter‐hospital transfer, acute cardiac failure, transport time (squared).
Adjusted for gender, age, resuscitated cardiac arrest, inter‐hospital transfer, acute cardiac failure, vasopressor.
Adjusted for gender, age, resuscitated cardiac arrest, inter‐hospital transfer, acute cardiac failure, daytime.
Mortality rate over the full follow‐up period.