Table 2.
SA-1: patient characteristics of the PS-matched subgroup
| CCT (n = 91) | Without CCT (n = 91) | Standardized differencea | |||
|---|---|---|---|---|---|
| Number or mean (SD)a | (%)a | Number or mean (SD)a | (%)a | ||
| Age (years) | |||||
| ≤ 58 | 47 | (52) | 44 | (48) | 0.066 |
| > 58 | 44 | (48) | 47 | (52) | |
| Gender | |||||
| Female | 5 | (5) | 3 | (3) | 0.107 |
| Male | 86 | (95) | 88 | (97) | |
| Residency | |||||
| Non-north | 66 | (73) | 70 | (77) | 0.101 |
| North | 25 | (27) | 21 | (23) | |
| Comorbidity | |||||
| Without | 79 | (87) | 83 | (91) | 0.141 |
| Withb | 12 | (13) | 8 | (9) | |
| BMI (kg/m2) | |||||
| ≤ 18.5 | 20 | (22) | 14 | (15) | 0.170 |
| > 18.5 | 71 | (78) | 77 | (85) | |
| Drinking | |||||
| No | 13 | (14) | 15 | (16) | 0.061 |
| Yes | 78 | (86) | 76 | (84) | |
| Smoking | |||||
| No | 10 | (11) | 10 | (11) | 0 |
| Yes | 81 | (89) | 81 | (89) | |
| Grade | |||||
| Poorly | 28 | (31) | 23 | (25) | 0.123 |
| Well/moderately differentiated | 63 | (69) | 68 | (75) | |
| Tumor location | |||||
| Upper | 46 | (51) | 44 | (48) | |
| Middle | 32 | (35) | 35 | (39) | 0.068 |
| Lower | 13 | (14) | 12 | (13) | 0.032 |
| Tumor size (cm) | |||||
| ≤ 5 cm | 38 | (42) | 43 | (47) | 0.111 |
| > 5 cm | 53 | (58) | 48 | (53) | |
| Clinical T-stage | |||||
| T1–T2 | 10 | (11) | 9 | (10) | 0.036 |
| T3–T4 | 81 | (89) | 82 | (90) | |
| Clinical N-stage | |||||
| N0 | 9 | (10) | 8 | (9) | 0.038 |
| N1–N2 | 82 | (90) | 83 | (91) | |
| Clinical stage | |||||
| II | 11 | (12) | 10 | (11) | 0.034 |
| III | 80 | (88) | 81 | (89) | |
| Reason for no surgery | |||||
| Without contraindication | 87 | (96) | 87 | (96) | 0 |
| With contraindication | 4 | (4) | 4 | (4) | |
| RT modality | |||||
| 3DCRT | 6 | (7) | 3 | (3) | 0.152 |
| IMRT | 85 | (93) | 88 | (97) | |
| Use of PET | |||||
| No | 34 | (37) | 36 | (40) | 0.045 |
| Yes | 57 | (63) | 55 | (60) | |
| RT break | |||||
| ≤ 1 week | 69 | (76) | 70 | (77) | 0.026 |
| > 1 week | 22 | (24) | 21 | (23) | |
| RT dose | |||||
| Low | 23 | (25) | 22 | (24) | 0.025 |
| High | 68 | (75) | 69 | (76) | |
| Induction chemotherapy | |||||
| Without | 87 | (96) | 86 | (95) | 0.051 |
| With | 4 | (4) | 5 | (5) | |
3DCRT, three-dimensional radiotherapy; BMI, Body Mass Index; CCT, consolidative chemotherapy; IGRT, image-guided radiotherapy; IMRT, intensity-modulated radiotherapy; PET, positron emission tomography; RT, radiotherapy; SD, standard deviation
aRounded
bModified Carlson comorbidity score ≥ 1