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Table 1: Clinical and pathologic characteristics of patients^{^a}
Characteristic All Patients (n = 183) (No.) (%) Solid Node Group (n = 78) (No.) (%) Cystic Node Group (n = 105) (No.) (%)
Mean age (yr) 56.1 56.2 56.1
Male sex 168 (91.8) 75 (96.2) 93 (88.6)
Smoking status 
    Never smoked (<1 Py) 56 (30.6) 23 (29.4) 33 (31.4)
    Ever smoked 120 (65.6) 51 (65.3) 69 (65.7)
        <10 Py 14 (7.7) 4 (5.1) 10 (9.5)
        >10 Py 68 (37.1) 30 (38.5) 38 (36.2)
        Unknown Py 38 (20.7) 17 (21.8) 21 (20.0)
    Unknown 1 (0.5) 0 (0.0) 1 (0.95)
    Other tobacco 6 (3.3) 4(5.1) 2 (1.9)
T classification 
    T1 74 (40.4) 28 (35.9) 46 (43.8)
    T2 73 (39.9) 35 (44.9) 38 (36.2)
    T3 16 (8.7) 7(8.9) 9 (8.6)
    T4 17 (9.3) 7 (9.0) 10 (9.5)
    Unknown 3 (1.6) 1 (1.3) 2 (1.9)
N classification 
    N1 31 (16.9) 13 (16.7) 18 (17.1)
    N2a 24 (13.1) 11 (14.1) 13 (12.4)
    N2b 97 (53.0) 37 (47.4) 60 (57.1)
    N2c 26 (14.2) 14 (17.9) 12 (11.4)
    N3 5 (2.7) 3 (3.8) 2 (1.9)
Overall stage 
    Stage III 28 (15.3) 10 (12.8) 18 (17.1)
    Stage IV 155 (84.7) 68 (87.2) 87 (82.9)
Primary tumor site 
    Tonsil 103 (56.2) 41 (53.0) 62 (60.0)
    BOT 76 (41.5) 35 (44.9) 41 (39.0)
    Other 2 (1.1) 1 (1.3) 1 (0.95)
    Unknown 2 (1.1) 1 (1.3) 1 (0.95)
Treatment 
    CRT 132 (72.1) 57 (73.1) 75 (71.4)
    Operation 12 (6.6) 5 (6.4) 7 (6.7)
Operation + MMT 39 (21.3) 16 (20.5) 23 (21.9)
Note:—Py indicates pack-year; BOT, base of tongue; CRT, chemoradiotherapy; MMT, multimodality therapy.
↵a No statistically significant correlation was found among any of the listed clinical and demographic variables compared with solid/cystic nodal status.