Table 2.

Offending rates for four categories of offences.

			All crimes		Non-serious acquisitive crimes		Serious acquisitive crimes		Violent crimes
Gender	Category	person years follow-up	Number	Rate [95% CI]	Number	Rate [95% CI]	Number	Rate [95% CI]	Number	Rate [95% CI]
Male	non-users	923,663	837,019	0.91 [0.90, 0.91]	176,783	0.19 [0.19, 0.19]	150,177	0.16 [0.16, 0.16]	61,730	0.07 [0.07, 0.07]
	Opiate users	290,007	528,153	1.82 [1.82, 1.83]	153,031	0.53 [0.53, 0.53]	103,654	0.36 [0.36, 0.36]	25,247	0.09 [0.09, 0.09]
	Pre-initiation	96,491	115,682	1.20 [1.19, 1.21]	25,285	0.26 [0.26, 0.27]	34,317	0.36 [0.35, 0.36]	6672	0.07 [0.07, 0.07]
	Post-initiation	97,788	270,885	2.77 [2.76, 2.78]	91,148	0.93 [0.93, 0.94]	40,917	0.42 [0.41, 0.42]	10,796	0.11 [0.11, 0.11]
	Initiation missing	95,728	141,586	1.48 [1.47, 1.49]	36,598	0.38 [0.38, 0.39]	28,420	0.30 [0.29, 0.30]	7779	0.08 [0.08, 0.08]
Female	non-users	304,612	100,525	0.33 [0.33, 0.33]	51,518	0.17 [0.17, 0.17]	4194	0.01 [0.01, 0.01]	8192	0.03 [0.03, 0.03]
	Opiate users	87,373	120,336	1.38 [1.37, 1.39]	66,637	0.76 [0.76, 0.77]	4509	0.05 [0.05, 0.05]	4840	0.06 [0.05, 0.06]
	Pre-initiation	32,839	15,139	0.46 [0.45, 0.47]	8335	0.25 [0.25, 0.26]	1096	0.03 [0.03, 0.04]	1149	0.03 [0.03, 0.04]
	Post-initiation	29,807	80,056	2.69 [2.67, 2.70]	44,767	1.50 [1.49, 1.52]	2451	0.08 [0.08, 0.09]	2523	0.08 [0.08, 0.09]
	Initiation missing	24,727	25,141	1.02 [1.00, 1.03]	13,535	0.55 [0.54, 0.56]	962	0.04 [0.04, 0.04]	1168	0.05 [0.04, 0.05]