Bladder cancer recurrence in subjects diagnosed with Ta-category tumors, with and without Gli1 expression. Proportion without recurrence was estimated from Cox proportional hazards model of time to first recurrence greater than 90 days from initial diagnosis, adjusted for age at diagnosis, sex, smoking status (never, former, and current smoker), size of tumor (<3 vs. ≥3 cm), tumor multiplicity, and treatment (TUR only vs. other treatment combinations). TUR = transurethral resection.