Table 1 Characteristics of the studies and X–Y pairs identified and analyzed
From: How concentrated is crime at places? A systematic review from 1970 to 2015
Characteristics | Prevalence | Frequency | ||
|---|---|---|---|---|
Number of studies | Number of X–Y pairs | Number of studies | Number of X–Y pairs | |
Year or report | ||||
 1971–1979 | 1 | 9 | 1 | 8 |
 1980–1989 | 3 | 83 | 3 | 74 |
 1990–1999 | 3 | 35 | 3 | 32 |
 2000–2009 | 6 | 100 | 4 | 77 |
 2010–2015 | 13 | 201 | 8 | 119 |
Measures of crime | ||||
 Crime incident | 24 | 393 | 17 | 277 |
 Calls for service | 2 | 35 | 2 | 33 |
Geographic unita | ||||
 Address (and intersection) | 3 | 54 | 3 | 49 |
 Household | 8 | 127 | 9 | 119 |
 Segment | 13 | 196 | 5 | 105 |
 Area (parks and buffers) | 1 | 12 | – | – |
Type of crimeb | ||||
 Violent | 6 | 55 | 4 | 25 |
 Property | 6 | 82 | 6 | 75 |
Country of dataset | ||||
 United States | 17 | 233 | 9 | 124 |
 Non-U.S. | 9 | 195 | 10 | 186 |
Total | ||||
 Studies analyzed | 26 | 428 | 19 | 310 |
 (Studies identified) | (44) | (489) | (20) | (316) |