Table 3.

Univariate logistic regression models for technique inefficacy, regrowth, and retreatment.

	Technique inefficacy(number of events = 7)		Regrowth(number of events = 19)		Retreatment(number of events = 10)
	OR (95%CI)	p-value	OR (95%CI)	p-value	OR (95%CI)	p-value
Age (years)	1.03 (0.97–1.09)	0.29	0.96 (0.92–0.99)	0.03	0.97 (0.92–1.01)	0.14
Sex Female Male	1.00 (ref) 4.98 (1.00–24.7)	0.05	1.00 (ref) 0.50 (0.13–1.96)	0.32	1.00 (ref) 3.86 (0.98–15.2)	0.05
Baseline volume (ml)	1.02 (0.96–1.08)	0.54	0.97 (0.93–1.02)	0.30	0.97 (0.93–1.10)	0.10
Nodule structure S PS PC	1.00 (ref) 0.92 (0.19–4.50) 0.0002 (0.00–INF)	0.95 0.99	1.00 (ref) 1.59 (0.48–5.40) 2.73 (0.72–10.30)	0.47 0.14	1.00 (ref) 1.67 (0.40–6.88) 0.50 (0.05–4.85)	0.48 0.55
Nodule function AFTN Non-AFTN	1.00 (ref) 0.35 (0.07–1.70)	0.20	1.00 (ref) 2.31 (0.69–7.77)	0.18	1.00 (ref) 2.26 (0.45–11.50)	0.32
IAR	0.94 (0.90–0.98)	0.002	1.01 (0.98–1.03)	0.60	0.96 (0.93–0.98)	0.002

AFTN is for autonomously functioning thyroid nodules, PC is for predominantly cystic, PS is for predominantly solid, and S is for solid nodules.