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Table 2 Poisson regression, MIH program (n = 73)

From: EMS utilization predictors in a Mobile Integrated Health (MIH) program

911 Calls IRR Std. Err z P >|z| 95% CI
Age category
19–33 (ref)
34–48 Years 1.119 0.272 0.46 0.644 0.695 1.802
49–64 Years 0.887 0.207 − 0.51 0.608 0.561 1.402
65–78 Years** 0.514 0.121 − 2.83 0.005 0.324 0.815
79 + *** 0.080 0.032 − 6.4 0.000 0.037 0.173
Marital status
Single (ref)
Married*** 0.358 0.061 − 6.06 0.000 0.257 0.499
Divorced*** 0.495 0.102 − 3.42 0.001 0.331 0.740
Widowed** 4.097 1.943 2.97 0.003 1.617 10.381
Sex
Female (ref)       
Male*** 2.067 0.230 6.52 0.000 1.662 2.572
Race
White (ref)       
Asian 0.000 0.005 − 0.02 0.983 0.000  
Black*** 1.896 0.327 3.71 0.000 1.352 2.660
Hispanic*** 7.652 2.208 7.05 0.000 4.347 13.472
Fall risk category
High risk*** 2.795 0.389 7.39 0.000 2.128 3.671
Persons living in the residence
1 (ref)       
2 0.989 0.142 − 0.08 0.939 0.746 1.311
3*** 2.467 0.463 4.81 0.000 1.708 3.564
4** 2.380 0.831 2.49 0.013 1.201 4.717
6*** 2.642 0.746 3.44 0.001 1.519 4.594
7 0.503 0.282 − 1.22 0.221 0.167 1.512
Asthma/COPD
Yes*** 2.693 0.398 6.71 0.000 2.016 3.598
Hypertension
Yes** 1.482 0.237 2.45 0.014 1.082 2.028
High cholesterol
Yes 0.774 0.111 − 1.79 0.073 0.584 1.025
CHF
Yes** 0.682 0.093 − 2.82 0.005 0.523 0.890
CVA/Stroke
Yes** 1.499 0.198 3.06 0.002 1.157 1.943
Psychiatric and/or Behavioral
Yes*** 1.580 0.195 3.71 0.000 1.241 2.011
Diabetes
Yes 1.100 0.128 0.81 0.416 0.875 1.382
Compliance with medications
Never (ref)       
Sometimes 1.258 0.253 1.14 0.255 0.847 1.867
Always 1.236 0.212 1.23 0.218 0.882 1.731
Number of medications*** 1.044 0.010 4.42 0.000 1.024 1.064
Primary insurance
Private (ref)       
Medicaid*** 0.297 0.067 − 5.42 0.000 0.191 0.461
Medicare 1.101 0.184 0.57 0.566 0.793 1.529
Travel times
0–9 min (ref)       
10–19 min*** 5.793 1.502 6.78 0.000 3.485 9.628
20–29 min*** 2.837 0.765 3.87 0.000 1.673 4.812
30–39 min*** 17.027 5.595 8.63 0.000 8.942 32.421
40 min and longer*** 10.200 3.303 7.17 0.000 5.407 19.243
Dual eligible
Yes*** 0.511 0.089 − 3.87 0.000 0.363 0.717
_cons 0.000 0.000 − 35.49 0.000 0.000 0.000
logPop 1 (offset)     
  1. *Significance at p < .05; **significance at p < .01; ***significance at p < ..001