Table 2.

Associations with surgical intervention

Variable	Surgery Rate (%)
Age at biopsy
<40 years	13/42 (31.0)
≥40 years	25/247 (10.1)
Maximum nodule dimension
<3 cm	21/225 (9.3)
≥3 cm	17/64 (26.6)
Presence of Afirma suspicious nodule outside the index nodule
Yes	7/11 (63.6)
No	31/278 (11.2)
Compressive symptoms
Yes	15/32 (46.9)
No	23/257 (8.9)