Table 3 Patient characteristics of the study population in the third supplementary analysis
Short interval (n = 71) | Long interval (n = 71) | |||||
|---|---|---|---|---|---|---|
Number or mean (sd)† | (%)† | Number or mean (sd)† | (%)† | SDif† | ||
Age | 54.25 (9.84) | 54.01 (8.42) | 0.026 | |||
Gender | Female | 5 | (7) | 5 | (7) | 0 |
Male | 66 | (93) | 66 | (93) | ||
Residency | Non-north | 43 | (61) | 42 | (59) | 0.029 |
North | 28 | (39) | 29 | (41) | ||
Tumor size | ≤ 5 cm | 32 | (45) | 32 | (45) | 0 |
> 5 cm | 39 | (55) | 39 | (55) | ||
Tumor differentiation | Poorly/undifferentiated | 17 | (24) | 18 | (25) | 0.033 |
Well/moderately | 54 | (76) | 53 | (75) | ||
RT delivery | Non-IGRT | 55 | (77) | 57 | (80) | 0.069 |
IGRT | 16 | (23) | 14 | (20) | ||
Use of PET | No | 9 | (13) | 7 | (10) | 0.089 |
Yes | 62 | (87) | 64 | (90) | ||
Tumor location | Cervical | ‡ | ‡ | ‡ | ‡ | 0 |
Non-cervical | ‡ | ‡ | ‡ | ‡ | ||
T-stage | T1–T2 | 9 | (13) | 9 | (13) | 0 |
T3–T4 | 62 | (87) | 62 | (87) | ||
N-stage | Negative | 10 | (14) | 10 | (14) | 0 |
Positive | 61 | (86) | 61 | (86) | ||
Drinking | No | 10 | (14) | 8 | (11) | 0.085 |
Yes | 61 | (86) | 63 | (89) | ||
Betel nut chewing | No | 28 | (39) | 27 | (38) | 0.029 |
Yes | 43 | (61) | 44 | (62) | ||
Smoking | No | 15 | (21) | 13 | (18) | 0.071 |
Yes | 56 | (79) | 58 | (82) | ||
BMI | 22.56 (2.73) | 22.11 (2.80) | 0.164 | |||
Number of LNs | < 15 | 16 | (23) | 19 | (27) | 0.098 |
≥ 15 | 55 | (77) | 52 | (73) | ||
RT dose (Gy) | 47.38 (3.93) | 47.48 (3.82) | 0.025 | |||
Patient volume | Low volume | 21 | (30) | 16 | (23) | 0.161 |
High volume | 50 | (70) | 55 | (77) | ||
Positive LN | 0.48 (0.91) | 0.44 (0.84) | 0.048 | |||