Table I.

Summary statistics for subjects in the normal, polyp, and nodule groups.

Group	Gender	n	Age	MFR	PTF
Normal	Female	21	33.8±11.5	0.11±0.04	0.05±0.02
	Male	19	35.5±12.2	0.15±0.09	0.06±0.04
	Total	40	34.6±11.7	0.13±0.07	0.06±0.03
Nodule	Female	21	39.3±8.89	0.16±0.07	0.08±0.05
Polyps	Female	12	42.3±10.2	0.13±0.07	0.06±0.03
	Male	11	43.2±5.76	0.34±0.18	0.16±0.09
	Total	23	42.7±8.20	0.23±0.17	0.11±0.08
Overall		84	38.0±10.7	0.16±0.11	0.08±0.06

All numbers presented as mean ± standard deviation. n = sample size; MFR = mean flow rate; PTF = phonation threshold flow.