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Table 4 As we had no specific calibration target for overall health seeking behaviour, other than a range of values from Zafar et al. (2018), we had to establish a parameter space for ‘rt_emergency_care_ISS_score_cut_off’, a parameter which influences the overall level of health seeking behaviour in the model

From: Estimating the health burden of road traffic injuries in Malawi using an individual-based model

Emergency care ISS score cut-off

Base rate of injury, calibrated for each value of the emergency ISS cut-off score to produce an incidence of road traffic injuries equal to the average GBD estimates from 2010 to 2019

Number of injury distribution, calibrated for each value of the emergency ISS cut-off score to produce an average number of injuries for those who sought care as was reported in Sundet et al. (2018)

Probability of in-hospital mortality for the ISS score boundary per run

1

0.0044

1

0.7094

ISS < 9

0.011

  

2

0.2062

10 ≤ ISS ≤ 15

0.016

  

3

0.0599

16 ≤ ISS ≤ 24

0.048

  

4

0.0174

25 ≤ ISS ≤ 35

0.204

  

5

0.0051

ISS > 35

0.346

  

6

0.0015

  
  

7

0.0004

  
  

8

0.0001

  

2

0.0043

1

0.7094

ISS < 9

0.009

  

2

0.2062

10 ≤ ISS ≤ 15

0.013

  

3

0.0599

16 ≤ ISS ≤ 24

0.037

  

4

0.0174

25 ≤ ISS ≤ 35

0.156

  

5

0.0051

ISS > 35

0.266

  

6

0.0015

  
  

7

0.0004

  
  

8

0.0001

  

3

0.0044

1

0.7094

ISS < 9

0.008

  

2

0.2062

10 ≤ ISS ≤ 15

0.012

  

3

0.0599

16 ≤ ISS ≤ 24

0.034

  

4

0.0174

25 ≤ ISS ≤ 35

0.146

  

5

0.0051

ISS > 35

0.248

  

6

0.0015

  
  

7

0.0004

  
  

8

0.0001

  

4

0.0043

1

0.7094

ISS < 9

0.008

  

2

0.2062

10 ≤ ISS ≤ 15

0.013

  

3

0.0599

16 ≤ ISS ≤ 24

0.036

  

4

0.0174

25 ≤ ISS ≤ 35

0.154

  

5

0.0051

ISS > 35

0.262

  

6

0.0015

  
  

7

0.0004

  
  

8

0.0001

  

5

0.0041

1

0.76127

ISS < 9

0.007

  

2

0.18174

10 ≤ ISS ≤ 15

0.013

  

3

0.04339

16 ≤ ISS ≤ 24

0.031

  

4

0.01036

25 ≤ ISS ≤ 35

0.131

  

5

0.00247

ISS > 35

0.223

  

6

0.00059

  
  

7

0.00014

  
  

8

0.00003

  

6

0.0041

1

0.76127

ISS < 9

0.006

  

2

0.18174

10 ≤ ISS ≤ 15

0.009

  

3

0.04339

16 ≤ ISS ≤ 24

0.027

  

4

0.01036

25 ≤ ISS ≤ 35

0.114

  

5

0.00247

ISS > 35

0.194

  

6

0.00059

  
  

7

0.00014

  
  

8

0.00003

  
  1. For each value of ‘rt_emergency_care_ISS_score_cut_off’, we had to calibrate specific parts of the model to match our model’s outputs to the other calibration targets, such as the overall incidence of road traffic injuries, the average number of injuries per person in hospital and the overall level of in-hospital mortality. This table shows the parameter value used for ‘base_rate_injrti’, ‘number_of_injured_body_regions_distribution’, ‘prob_death_iss_less_than_9’, ‘prob_death_iss_10_15’, ‘prob_death_iss_16_24’, ‘prob_death_iss_25_35’ and ‘prob_death_iss_35_plus’ for each value of ‘rt_emergency_care_ISS_score_cut_off’ in our simulations