Table 2 Distribution of the 3830 disease–nuisance associations and corresponding number of reports between those which do or do not generate a signal with the PRR₁ and PRR₂ criteria

		Not compensated		Compensated			Total
		Associations	Reports		Associations	Reports		Associations	Reports
Associations reported once		42%	6%		23%	4%		65%	10%
Associations reported once		1600	1600		886	886		886	2486
PRR₁ criterion (associations reported at least twice)	Signal	4%	18%		13%	63%		17%	81%
		162	4448		508	15 595		670	20 043
	No signal	7%	3%		11%	6%		18%	9%
		260	655		414	1601		674	2256
	Subtotal	11%	21%		24%	69%		35%	90%
		422	5103		922	17 196		1344	22 299
Total		53%	27%		47%	73%		100%	100%
		2022	6703		1808	18 082		3830	24 785
Associations reported once		42%	6%		23%	4%		65%	10%
Associations reported once		1600	1600		886	886		886	2486
PRR₂ criterion (associations reported at least twice)	Signal	8%	19%		18%	64%		26%	84%
		324	4722		704	15 988		1028	20 710
	No signal	3%	2%		6%	5%		9%	6%
		98	381		218	1208		316	1589
	Subtotal	11%	21%		24%	69%		35%	90%
		422	5103		922	17 196		1344	22 299
Total		53%	27%		47%	73%		100%	100%
		2022	6703		1808	18 082		3830	24 785

Values are ratio in % and number of reports.