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Table 6 Logistic model significant predictors of myocardial infarction time intervals exceeding emergency medical services guidelines

From: Emergency medical services transport delays for suspected stroke and myocardial infarction patients

Predictors

Adjusted Odds Ratio

p-value

95 % Confidence Interval

Outcome: Total Time > 60 Min

   

 Age (x10 years)

1.212

0.0008

1.083, 1.355

 EMS 1

1.093

0.809

0.530, 2.255

 2

Referent

Referent

Referent

 Specialty Center (No)

0.560

0.0004

0.408, 0.770

 (Yes)

Referent

Referent

Referent

 EMS X Age (x10 years)

0.843

0.003

0.753,

Outcome: Response Time > 10 Min

 Age (x10 years)

1.112

0.0019

1.040, 1.188

 EMS 1

0.839

0.0097

0.733, 0.958

 2

Referent

Referent

Referent

 EMS X Season (Fall)

1.271

0.0106

1.058, 1.528

 EMS X Season (Spring)

0.744

0.0089

0.596, 0.929

 EMS X Season (Summer)1

1.076

0.499

0.870, 1.328

 EMS X Season (Winter)

Referent

Referent

Referent

Outcome: On-Scene Time > 15 Min

 Age (x10 years)

1.186

<0.0001

1.130, 1.246

 EMS 1

0.901

0.0445

0.813, 0.998

 2

Referent

Referent

Referent

 Season (Fall)b

1.056

0.4979

0.901, 1.239

 Season (Spring)b

0.848

0.0870

0.701, 1.024

 Season (Summer)b

0.981

0.8250

0.825, 1.165

 Season (Winter)

Referent

Referent

Referent

 EMS X Season (Fall)

1.273

0.0029

1.087, 1.493

 EMS X Season (Spring)

1.047

0.6338

0.866, 1.266

 EMS X Season (Summer)a

0.790

0.0073

0.665, 0.938

 EMS X Season (Winter)

Referent

Referent

Referent

  1. aAlthough EMS X Season (summer) was not significant, there was an overall statistical significance (p = 0.0136) of the interaction term
  2. bAlthough the main effect of season was not significant in the model, season was kept in the model because of the overall statistical significance (p = 0.039) of the EMS X Season interaction term