Table 1.

The extraction model of the association rule between sampling points.

Antecedents	Consequents	Antecedent support	Consequent support	Support	Confidence	Lift	Leverage	Conviction
Door cuff	Nightstand	0.407407	0.555556	0.333333	0.818182	1.472727	0.106996	2.444444
Door cuff	Wall	0.407407	0.444444	0.296296	0.727273	1.636364	0.115226	2.037037
Door cuff	Ground	0.407407	0.666667	0.296296	0.727273	1.090909	0.024691	1.222222
Door cuff	Bed rails	0.407407	0.555556	0.333333	0.818182	1.472727	0.106996	2.444444
Wall, door cuff	Nightstand	0.296296	0.555556	0.259259	0.875000	1.575000	0.094650	3.555556
Wall, nightstand	Door cuff	0.259259	0.407407	0.259259	1.000000	2.454545	0.153635	inf
Door cuff, nightstand	Wall	0.333333	0.444444	0.259259	0.777778	1.750000	0.111111	2.500000
Door cuff, night stand	Bed rails	0.333333	0.555556	0.259259	0.777778	1.400000	0.074074	2.000000
Door cuff, bed rails	Nightstand	0.333333	0.555556	0.259259	0.777778	1.400000	0.074074	2.000000
Night stand, bed rails	Door cuff	0.333333	0.407407	0.259259	0.777778	1.909091	0.123457	2.666667
Ground, door cuff	Bed rails	0.296296	0.555556	0.259259	0.875000	1.575000	0.094650	3.555556
Ground, bed rails	Door cuff	0.333333	0.407407	0.259259	0.777778	1.909091	0.123457	2.666667
Door cuff, nightstand	Ground	0.333333	0.666667	0.259259	0.777778	1.166667	0.037037	1.500000