Table 4 Categorization of predictor variables
Category | n | Subcategory | N | Unique variables | Measurement levels observed |
|---|---|---|---|---|---|
Kinematics | 9 | Travel distance | 8 | 3 | Dichotomous, scale |
Travel speed | 1 | 1 | Scale | ||
Exogenous | 71 | Day of the week | 8 | 2 | Dichotomous, scale |
Demand | 5 | 1 | Scale | ||
Road type | 12 | 6 | Dichotomous, nominal, ordinal | ||
Time of day | 36 | 3 | Dichotomous, nominal | ||
Traffic | 4 | 2 | Dichotomous | ||
Weather type | 6 | 4 | Dichotomous | ||
Human involvement | 150 | Caller characteristics | 39 | 16 | Dichotomous, scale |
Community characteristics | 87 | 23 | Scale, dichotomous, nominal | ||
Victim characteristics | 23 | 10 | Dichotomous, nominal, ordinal, scale | ||
Witness characteristics | 1 | 1 | Nominal | ||
Incident | 276 | Incident characteristics | 27 | 9 | Ordinal, dichotomous, nominal |
Incident type | 249 | 8 | Nominal, dichotomous | ||
Innovation | 19 | AGDS | 11 | 1 | Dichotomous |
AVL | 2 | 1 | Dichotomous | ||
Emergency button | 1 | 1 | Dichotomous | ||
Response unit type | 5 | 1 | Nominal | ||
Police strategies | 93 | Call priority | 34 | 1 | Ordinal, dichotomous, nominal |
Department size | 7 | 3 | Scale | ||
Differential response system | 4 | 1 | Dichotomous | ||
Jurisdiction area size | 4 | 2 | Scale | ||
No. officers per response unit | 9 | 6 | Dichotomous, nominal | ||
Non-emergency number | 8 | 1 | Dichotomous | ||
On duty officers | 2 | 1 | Scale | ||
Patrol strategy | 16 | 11 | Dichotomous, ordinal | ||
Shift | 2 | 1 | Nominal | ||
Workload | 7 | 5 | Scale |