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. 2006 Jan;23(1):12–17. doi: 10.1136/emj.2004.023028

Table 3 ED intervention at club 1. Comparison of assaults in club 1 before and after ED intervention and with nine other “hotspot” venues.

Capacity Assaults in first (preintervention) period Assaults in second (intervention) period Total assaults Event ratio 95% CI
Club 1* 2000 71 33 104 0.46 0.31 to 0.70
Club Z 1970 50 44 94 0.88 0.59 to 1.32
Club B 600 37 30 67 0.81 0.50 to 1.31
Club R 400 27 19 46 0.70 0.39 to 1.26
Club D 910 24 13 37 0.54 0.28 to 1.05
Club Bl 850 16 6 22 0.38 0.15 to 0.93
Club K 380 13 4 17 0.31 0.11 to 0.90
Club S 250 12 4 16 0.33 0.11 to 0.98
Club S1 6000 11 19 30 1.73 0.84 to 3.57
Club E 380 10 16 26 1.60 0.74 to 3.46
All others† 200 155 355 0.78 0.63 to 0.96

95% CI used throughout (z = 1.96).

*Club 1 was also subject to high level police intervention.

†Club 1 versus all other clubs pooled.