07 Assessment Flashcards
1
Q
AIS coding
A
AIS1: Minor
AIS2: Moderate
AIS3: Serious
AIS4: Severe
AIS5: Critical
AIS6: Fatal
2
Q
Risk funktion
A
x: Specific diminution for ex. Dmax (mm)
y: Specific risk for ex. for AIS4
Risk function + confidenz limit
3
Q
Types of Models (risk function)
A
1) logistic regression Survival Model
2) Non parametric (Kaplan-Meier) Semi- parametric/ Parametric
3) right censored treatment and right interval censored treatment
4) Exponetial / weibull / log-log / log-normal
4
Q
Censored Data
A
- exact data (when injury occur)
- left censoring (data point is below a certain value but it’s unknown by how much)
- right censoring (data point is above a certain value but it’s unknown by how much)
- interval censoring (data point is somewhere between to values)
5
Q
negative dose response
A
more compression = higher survival (doesn’t make sense) -> should never be considered
6
Q
Injury risk function: Problems lab vs. real world
A
- difference living vs. dead tissue
- small test samples
- sample population isn’t population at risk
- various injury mechanisms
- censored data
- determination of suitable injury criteria
7
Q
Test without dummy
A
measuring force till denting
example IIHS rollover roof strengt
8
Q
HIC
A
- is based on SI which is based on Wayne State Tolerance Curve
- SI: Forehead fracture risk as function of linear acceleration and duration
- only frontal impacts
9
Q
not part of HIC
A
- linear fracture
- depressed fracture
- diastatic fracture
- basilar fracture
