Table 1 Characteristics of studies in the meta-analysis
From: Ravenous wolves revisited: a systematic review of offending concentration
Characteristics | Prevalence | Frequency | Â | ||
|---|---|---|---|---|---|
Number of studies | Number of ordered pairs | Number of studies | Number of ordered pairs | Number of studies included in both | |
Publication decade | |||||
 1950–1959 | 0 | 0 | 1 | 10 | 0 |
 1960–1969 | 0 | 0 | 0 | 0 | 0 |
 1970–1979 | 1 | 3 | 2 | 8 | 1 |
 1980–1989 | 3 | 26 | 9 | 105 | 3 |
 1990–1999 | 4 | 43 | 6 | 74 | 4 |
 2000–2009 | 6 | 80 | 8 | 88 | 4 |
 2010–2014 | 1 | 2 | 1 | 3 | 0 |
Type of offender | |||||
 Adult | 3 | 34 | 7 | 71 | 2 |
 Youth | 7 | 64 | 12 | 110 | 6 |
 Male | 13 | 108 | 14 | 119 | 11 |
 Female | 5 | 17 | 7 | 35 | 4 |
 United States | 10 | 95 | 17 | 170 | 8 |
 Non-United Statesa, b | 5 | 59 | 10 | 118 | 4 |
Studies analyzed | 15 | 154 | 27 | 288 | Â |
(Studies identified) | (55) | (263) | (44) | (358) | Â |