Table 2.

Nodule size and numbers of nodules and patients.

Parameter	Nodules	Patients	Final diagnosis
			Benign	Malignant	P value∗
All nodules	1525	1498	726	799
Mean patient age (y)		43.5	44.7	42.3	<0.001
Women	904	887	352	552	<0.001
Men	621	611	374	247
0 < D ≤ 0.5 cm	74	71	16	58
Mean patient age (y)		44.4	45.6	44.1	0.625
Women	47	44	5	42	0.002
Men	27	27	11	16
0.5 < D ≤ 1.0 cm	528	518	197	331
Mean patient age (y)		43.0	43.1	42.9	<0.815
Women	315	308	80	235	<0.001
Men	213	210	117	96
1.0 < D ≤ 2.0 cm	715	704	429	286
Mean patient age (y)		44.3	45.1	43.1	0.035
Women	426	417	228	198	<0.001
Men	289	287	201	88
2.0 < D ≤ 2.5 cm	208	205	84	124
Mean patient age (y)		41.7	46.6	38.4	<0.001
Women	116	116	39	77	0.026
Men	92	89	45	47

Note. Unless otherwise indicated, the data point is the number of nodules or patients. ^∗P value calculated by using the generalized estimating equation analysis.