Use of organic solvents in large research institutions in Japan

Table 6 Laboratories of adequqte and inadequate environment

Research fields	Total cases (%)^b	Administrative control classes^a (no. of cases)
Research fields	Total cases (%)^b	Class 1 (%)	Class 2 (%)	Class 3 (%)	Classes 2 + 3 (%)
AGR	594 (13.2)	587 (98.8)	5 (0.8)	2 (0.3)	7 (1.2)
BIOL	664 (14.7)	662 (99.7)	2 (0.3)	0 (0.0)	2 (0.3)
MED	1017 (22.5)	1015 (99.8)	1 (0.1)	1 (0.1)	2 (0.2)
SCI	1089 (24.1)	1088 (99.9)	1 (0.1)	0 (0.0)	1 (0.1)
T&E	1153 (25.5)	1133 (98.3)	17 (1.5)	3 (0.3)	20 (1.7)
Other than T&E^d	3364 (74.5)	3352 (99.6)	9 (0.3)	3 (0.1)	12 (0.4)^e
Biological^f	2275 (50.4)	2264 (99.5)	8 (0.4)	3 (0.1)	11 (0.5)^g
Chemical^f	2242 (49.6)	2221 (99.1)	18 (0.8)	3 (0.1)	21 (0.9)^g
Total	4517 (100.0)	4485 (99.3)	26 (0.6)	6 (0.1)	32 (0.7)

^aAs defined by the Regulation (Ref. 7: for details, see the “Materials and methods”): Class 1, those with adequate environment; Class 2 and Class 3, those with inadequate environment
^b% over total laboratories (i.e., n = 4517)
^c% over total laboratories in each field
^dAGR + BIOL + MED + SCI
^eThe difference of AGR + BIOL + MED + SCI from T&E is significant (p < 0.01)
^fBiological; AGR + BIOL + MED: Chemical; CSI + T&E
^gThe difference between the ‘Biological’ group and the ‘Chemical’ group is insignificant (p > 0.10)

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