Table 6.

The death status of CWP cases.

Group	N	Death		χ2	p
		N	%
Stage				88.085	<0.0001
I	352	35	9.94
II	87	26	29.89
III	56	34	60.71
Job titles				0.005	0.946
Tunneling and mining	449	86	19.15
Transporting and helping	46	9	19.57
Eras of diagnosis				138.683	<0.0001
<1980	91	55	60.44
1980–	69	17	24.64
1990–	229	23	10.04
2000–	106	0	0