Table IV.

Interaction between individual and program factors with endocrine surgery operative volume

Individual/Program factors	Estimate*	95% CI			P value
Intercept	30	27	to	33	Reference
Sex female	0	−1	to	1	.80
Race/ethnicity Black	−5	−9	to	−1	.02†
Race/ethnicity Asian	4	1	to	6	< .01†
Race/ethnicity Hispanic	3	−1	to	7	.15
Race/ethnicity other	−3	−8	to	1	.16
Program size large	−9	−12	to	−7	< .01†
Program size medium	3	1	to	6	< .01†
NIH funding top 50th percentile	1	−2	to	3	.46
NIH funding bottom 50th percentile	−10	−12	to	−8	< .01†
Program operative volume high	5	3	to	6	< .01†
Program operative volume medium	1	−1	to	2	.52
Faculty, endocrine surgeon‡	8	7	to	10	< .01†
Faculty, dedicated endocrine otolaryngologist§	−3	−4	to	−1	< .01†
Other AAES-accredited fellowship	4	2	to	6	< .01†
Other associated otolaryngology residency	5	2	to	8	< .01†
Other endocrine surgery rotation	10	8	to	12	< .01†

AAES, American Association of Endocrine Surgeons; NIH, National Institutes of Health.

^*Results of multivariable linear regression analysis are displayed. The reference group was set as White male residents at small, low-volume, non-NIH funded residency programs with no associated endocrine surgery program characteristics, which represents the intercept in the model. Estimates for total endocrine surgery case volumes along with lower and upper limits corresponding to the bounds of 95% CIs are shown with associated P values.

^†Text here.

^‡An AAES-fellowship trained endocrine surgeon.

^§An otolaryngologist for whom thyroid and parathyroid surgery constitutes >50% of practice.