Previous analysis on the association between silica dust exposure and lung cancer deaths among the Chinese silica cohort.

Table 1: Previous analysis on the association between silica dust exposure and lung cancer deaths among the Chinese silica cohort.

Analyses methods	Follow-up periods
Analyses methods	1960-1989	1960-1994	1960-2003
SMR	Chen J, et al. [3]
Internal comparison¹		Steenland K, et al. [5]	Chen W, et al. [1]
Internal comparison²	Mc Laughlin JK [4]	Cocco P, et al. [6] Chen W, et al. [7] Chen W, et al. [8] Chen W, et al. [9]	Liu, et al. [2]

¹Without consideration of occupational confounders; ²With consideration of occupational confounders.