Table 1.
Patients Characteristics by Xerostomia Injury and Recovery.
| Type of Patients | |||
|---|---|---|---|
| No xerostomia (i: N = 82) | Injury and Recovery (ii: N = 135) | Injury but No recovery (iii: N = 41) | |
| Age >65 years * | 26 (31.7) | 35 (25.9) | 11 (26.8) |
| Race * | |||
| Caucasian | 61 (75) | 109 (78) | 36 (83) |
| African American | 19 (23) | 23 (17) | 4 (10) |
| Other | 2 (2) | 3 (2) | 1 (2) |
| Gender * | |||
| Female | 24 (29) | 21 (16) | 11 (27) |
| Male | 58 (71) | 114 (84) | 30 (73) |
| Tumor site * | |||
| Hypopharynx | 2 (2) | 2 (1) | 2 (5) |
| Larynx | 15 (18) | 20 (15) | 0 (0) |
| Nasopharynx | 3 (4) | 7 (5) | 0 (0) |
| Oral Cavity | 11 (13) | 43 (32) | 12 (29) |
| Oropharynx | 27 (33) | 51 (38) | 22 (54) |
| Others | 24 (29) | 12 (9) | 5 (12) |
| T stage ** | |||
| 0 and 1 | 25 (30) | 38 (28) | 5 (12) |
| 2 and above | 43 (52) | 88 (65) | 30 (73) |
| missing | 14 (17) | 9 (7) | 6 (14) |
| N stage ** | |||
| 0 | 31 (38) | 36 (27) | 8 (20) |
| 1 and 2 | 37 (45) | 88 (65) | 26 (63) |
| missing | 14 (17) | 11 (8) | 7 (17) |
| M stage** | |||
| M0 | 63 (77) | 121 (90) | 33 (80) |
| M1 | 1 (1) | 2 (1) | 3 (7) |
| missing | 18 (22) | 12 (9) | 5 (12) |
| Chemotherapy* | |||
| Yes | 49 (60) | 99 (73) | 27 (66) |
| No | 33 (40) | 36 (27) | 14 (34) |
| Volume – cc *** (mean ± sd) | |||
| iPG | 57.9 ± 18.6 | 60.4 ± 18.6 | 53.6 ± 18.7 |
| cPG | 58.6 ± 17.8 | 60.7 ± 18.6 | 54.6 ± 17.5 |
| iSMG | 19.9 ± 7.2 | 21.3 ± 11.2 | 18.7 ± 5.4 |
| cSMG | 21.0 ± 6.1 | 21.5 ± 11.3 | 18.9 ± 5.2 |
| iOC | 178.1 ± 42.7 | 180.3 ± 40.01 | 177.1 ± 38.9 |
| cOC | 176.6 ± 41.7 | 178.9 ± 40.1 | 177.2 ± 40.0 |
*Categorical variables were displayed as count and percentage.
**American Joint Committee on Cancer (AJCC) staging 7.0th edition. For T stage, 0 includes T0 and Tis; 4 includes T4a and T4b. For N stage, 2 includes N2a, N2b and N2c.
***Continuous variables were displayed as mean ± SD. Volume includes contours +3 mm shell.