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Table 1 Descriptive statistics

From: Situational crime prevention and worldwide piracy: a cross-continent analysis

Variables n %
Dependent variable: unsuccessful attack
 Yes (1) 2351 49.4
 No (0) 2404 50.6
Independent variables
 Increase perceived risk variables
  Increased Risk Index
   0 2180 47.9
   1 1237 27.2
   2 1051 23.1
   3 87 1.9
  Alarm raised
   Yes (1) 1917 39.7
   No (0) 2913 60.3
  Watchman present
   Yes (1) 1241 25.7
   No (0) 3589 74.3
  Anti-piracy watch
   Yes (1) 307 6.4
   No (0) 4520 93.6
  Private security
   Yes (1) 265 5.5
   No (0) 4565 94.5
  Increased lighting
   Yes (1) 206 4.3
   No (0) 4622 95.7
 Increase perceived effort variables
  Increased Effort Index
   0 3207 70.4
   1 939 20.6
   2 345 7.6
   3 62 1.4
   4 1 0.0
  Evasive maneuvers
   Yes (1) 667 13.8
   No (0) 4161 86.2
  Crew mustered
   Yes (1) 801 16.5
   No (0) 4068 83.5
  Vessel increase speed
   Yes (1) 410 8.5
   No (0) 4414 91.5
  Electric perimeter fence
   Yes (1) 24 0.5
   No (0) 4844 99.5
Control variables n %
Time
 00:00–05:59 1964 48.6
 06:00–11:59 680 16.8
 12:00–17:59 533 13.2
 18:00–23:59 867 21.4
Quarter of the year
 1 Qtr. 1194 24.4
 2 Qtr. 1364 27.8
 3 Qtr. 1146 23.4
 4 Qtr. 1198 24.4
Weapons present
 Yes (1) 1294 49.1
 No (0) 1344 50.9
Vessel status
 Stationary (0) 2568 53.2
 At sail (1) 2255 46.8
Number of pirates
 Mean 6.37 na
 Standard deviation 7.13 na
 Min. 1 na
 Max. 200 na
Vessel type
 Tanker, bulk carrier, or container (1) 3401 69.4
 Other vessel type (0) 1501 30.62
Year
 2000 469 9.6
 2001 334 6.8
 2002 370 7.6
 2003 448 9.1
 2004 335 6.8
 2005 276 5.6
 2006 239 4.9
 2007 263 5.4
 2008 295 6.0
 2009 407 8.3
 2010 458 9.3
 2011 442 9.0
 2012 301 6.1
 2013 265 5.4