Table 2.

Crude smoking-associated risk of terminal renal failure in 144 male patients with IgA glomerulonephritis or autosomal dominant polycystic kidney disease (44)

Pack-YearsCases(n [%])Controls(n [%])OR95% CIPa
a Wald χ2.
0 to 526 [36]47 [65]1.0
5 to 1517 [24]11 [15]3.51.3 to 9.60.017
>1529 [40]14 [19]5.82.0 to 170.001