Table 1 Distributions specifying activity durations and diagnostic characteristics for the current decentralised model
Activity duration (minutes) | ||||
|---|---|---|---|---|
Model parameter | Distribution: type | Parameters | ||
Time from stroke onset to call for help | Continuous empirical | |||
Route 1 | Left bound | Right bound | Frequency | |
0 | 5 | 39 | ||
5 | 10 | 21 | ||
10 | 15 | 15 | ||
15 | 30 | 35 | ||
30 | 45 | 33 | ||
45 | 60 | 14 | ||
60 | 120 | 40 | ||
120 | 180 | 16 | ||
180 | 240 | 10 | ||
240 | 480 | 9 | ||
480 | 2880 | 230 | ||
Route 2 | 0 | 5 | 1 | |
5 | 10 | 1 | ||
10 | 15 | 1 | ||
480 | 2880 | 15 | ||
Route 3 | 0 | 60 | 9 | |
60 | 120 | 17 | ||
120 | 180 | 3 | ||
180 | 240 | 4 | ||
240 | 480 | 2 | ||
480 | 2880 | 286 | ||
Delay first responder | ||||
911 call | Uniform | Min (1.00), Max (2.00) | ||
GP consult by telephone | Uniform | Min (2.00), Max (5.00) | ||
GP consult by visit | Triangle | Mode (40.00), Min (10.00), Max (30.00) | ||
EMS | ||||
Response time | ||||
A1 | Continuous empirical | Left bound | Right bound | Frequency |
0 | 5 | 53 | ||
5 | 10 | 145 | ||
10 | 15 | 85 | ||
15 | 20 | 23 | ||
20 | 25 | 2 | ||
25 | 30 | 1 | ||
30 | 35 | 0 | ||
35 | 40 | 2 | ||
A2 | Gamma | Alpha (3.36), Beta (4.22) | ||
B | Beta | Alpha 1 (0.69), Alpha 2 (0.53), a (8.92), b (59.33) | ||
Time spent on scene | ||||
A1 | Continuous empirical | Left bound | Right bound | Frequency |
0 | 5 | 3 | ||
5 | 10 | 45 | ||
10 | 15 | 106 | ||
15 | 20 | 87 | ||
20 | 25 | 39 | ||
25 | 30 | 13 | ||
30 | 35 | 8 | ||
35 | 40 | 3 | ||
40 | 45 | 4 | ||
45 | 60 | 2 | ||
A2 | Lognormal | Mean (15.24), St. dev. (7.67) | ||
B | Lognormal | Mean (15.12), St. dev. (8.14) | ||
Transport time | ||||
A1 | Beta | Alpha1 (1.69), Alpha2 (4.16), a (39.66), b (0.62) | ||
A2 | Gamma | Alpha (5.53), Beta (2.51) | ||
B | Beta | Alpha 1 (1.07), Alpha 2 (1.41), a (0.02), b (31.61) | ||
Time to neurological consultation | Continuous empirical | Left bound | Right bound | Frequency |
0 | 0 | 79 | ||
0 | 1 | 5 | ||
1 | 2 | 13 | ||
2 | 5 | 39 | ||
5 | 10 | 30 | ||
10 | 15 | 19 | ||
15 | 30 | 12 | ||
30 | 72 | 19 | ||
Time to neuroimaging (CT) examination | Continuous empirical | Left bound | Right bound | Frequency |
0 | 5 | 9 | ||
5 | 10 | 23 | ||
10 | 15 | 36 | ||
15 | 20 | 29 | ||
20 | 25 | 32 | ||
25 | 30 | 29 | ||
30 | 35 | 21 | ||
35 | 40 | 11 | ||
40 | 45 | 11 | ||
45 | 50 | 3 | ||
50 | 55 | 2 | ||
55 | 60 | 7 | ||
85 | 90 | 3 | ||
90 | 135 | 2 | ||
Time to laboratory examination | Continuous empirical | Left bound | Right bound | Frequency |
0 | 0 | 61 | ||
0 | 10 | 5 | ||
10 | 15 | 8 | ||
15 | 20 | 14 | ||
20 | 25 | 18 | ||
25 | 30 | 16 | ||
30 | 35 | 14 | ||
35 | 40 | 20 | ||
40 | 45 | 18 | ||
45 | 50 | 12 | ||
50 | 80 | 16 | ||
Treatment decision | Triangle | Mode (10), Min (5), Max (20) | ||
tPA mixing | Constant | 5 | ||
Diagnostics | ||||
Choice of route | Discrete empirical | Value | Frequency | |
1. EMS transport | 1 | 462 | ||
2. In-hospital | 2 | 18 | ||
3. Self-transport | 3 | 321 | ||
Choice first responder | Discrete empirical | Value | Frequency | |
1. 911 call | 1 | 184 | ||
2. GP consult by phone | 2 | 56 | ||
3. GP consult by visit | 3 | 126 | ||
EMS transport, level of urgency | Discrete empirical | Value | Frequency | |
911 call | ||||
1. A1 | 1 | 92 | ||
2. A2 | 2 | 7 | ||
3. B | 3 | 1 | ||
GP consult by telephone | ||||
1. A1 | 1 | 60 | ||
2. A2 | 2 | 39 | ||
3. B | 3 | 1 | ||
GP consult by visit | ||||
1. A1 | 1 | 47 | ||
2. A2 | 2 | 42 | ||
3. B | 3 | 11 | ||