Before revision:  The effect was modified by age (p<0.001), with ORs of 0.96-1.13 below age 20 years and 1.57-1.67 in age groups 40 years or older.
After revision:  The effect was modified by age (p<0.001), with HRs of 0.93-1.21 for SGTF compared to non-SGTF patients below age 20 years and 1.57-1.67 in age groups 40 years or older.