Table 2

Logistic regression model of PFD use by boaters on small and large recreational power vessels before and after the implementation of the 2005 Victorian mandatory PFD wear regulations, overall and by gender, age, vessel type and trip purpose (activity of boater)

Strata	Level	Vessel length	Odds of PFD wear after the 2005 regulations versus before	95% CI		Stat. Sig.
Strata	Level	Vessel length	Odds of PFD wear after the 2005 regulations versus before	Lower	Upper	Stat. Sig.
All vessel occupants
	All	S	8.173	6.612	10.103	<0.001
		L	1.267	0.943	1.703	0.116
Gender
	Male	S	8.223	6.504	10.396	<0.001
		L	1.381	0.951	2.006	0.090
	Female	S	7.952	4.844	13.054	<0.001
		L	1.096	0.675	1.778	0.711
Age
	0–9 years	S	8.776	2.550	30.200	0.001
		L	1.235	0.657	2.321	0.513
	10–17 years	S	5.685	3.359	9.621	<0.001
		L	1.730	1.006	2.973	0.047
	18–59 years	S	7.983	6.263	10.177	<0.001
		L	1.126	0.724	1.752	0.598
	60+years	S	33.560	10.893	103.391	<0.001
		L	0.522	0.102	2.673	0.435
Type of vessel
	Open	S	27.705	17.772	43.189	<0.001
		L	2.008	1.035	3.895	0.039
	Cuddy/half cabin cruiser	S	26.278	12.665	54.522	<0.001
		L	1.168	0.655	2.083	0.599
	Full cabin cruiser	S
		L	0.544	0.172	1.718	0.299
	Ski boat	S	27.485	4.504	167.716	<0.001
		L	1.214	0.645	2.282	0.548
	PWC	S	2.648	1.030	6.805	0.043
		L
	Yacht (motor/trailer sailor)	S
		L	0.212	0.072	0.626	0.005
	Other/unknown	S	6.882	2.327	20.352	<0.001
		L	29.503	3.159	275.491	0.003
Trip purpose (activity of boater)
	Fishing	S	60.438	32.715	111.652	<0.001
		L	1.495	0.810	2.760	0.198
	Towed water sport	S	4.395	1.595	12.111	0.004
		L	1.775	0.950	3.316	0.072
	Pleasure cruising/general	S	18.348	10.471	32.150	<0.001
		L	1.432	0.765	2.681	0.262
	High-speed racing	S
		L
	PWC riding	S	2.612	1.016	6.717	0.046
		L
	Sailing	S
		L	0.378	0.143	0.996	0.049
	Other	S	1.376	0.495	3.822	0.540
		L	1.979	0.528	7.422	0.311

Note: Empty cells indicate insufficient data to obtain estimate.
PFD, personal flotation device; PWC, personal watercraft/jet ski.