A Data-Driven Approach Based on Historical Hazard Records for Supporting Risk Analysis in Complex Workplaces

Table 9

Comparison of different minimum support thresholds.

		1-item set	2-item set	3-item set	4-item set	5-item set	6-item set	7-item set
Number of keywords	Multiple	1284	1071	665	308	152	40	15
	2	1284	1071	667	327	158	40	15
	5	634	834	142	1	—	—	—
	10	313	240	18	—	—	—	—
Number of items	Multiple	1284	3421	1632	445	130	35	8
	2	1284	4664	2770	653	159	42	9
	5	634	384	80	4	—	—	—
	10	313	165	20	—	—	—	—
Ratio	Multiple	100%	31%	41%	69%	117%	114%	188%
	2	100%	23%	24%	50%	99%	95%	167%
	5	100%	217%	178%	25%	—	—	—
	10	100%	145%	90%	—	—	—	—