1. Baseline characteristics of participants.
| Variables | n (%) | P | |||||
| Normal
(N=70) |
Esophagitis
(N=70) |
LGIN
(N=70) |
HGIN
(N=19) |
ESCC
(N=7) |
Total
(N=236) |
||
| *, Due to the lack of information on this variable in one participant with HGIN, the number of participants with HGIN and all participants are 18 and 235 respectively in this variable; #, All diet questions except spicy food are about the dietary frequency in the past year. Spicy food is about the dietary frequency in the past month. Salty degree includes salty, medium and light. Frequency options include every day, 4−6 d/week, 1−3 d/week, 1−3 d/month and never. LGIN, low-grade intraepithelial neoplasia; HGIN, high-grade intraepithelial neoplasia; ESCC, esophageal squamous cell carcinoma. | |||||||
Age (year) (
)
|
51.89±7.66 | 54.80±7.16 | 56.21±6.43 | 56.89±7.15 | 59.29±6.13 | 54.66±7.30 | <0.01 |
| Male | 21 (30.00) | 29 (41.43) | 24 (34.29) | 11 (57.89) | 4 (57.14) | 89 (37.71) | 0.14 |
| Married | 65 (92.86) | 61 (87.14) | 59 (84.29) | 16 (84.21) | 7 (100) | 208 (88.14) | 0.45 |
| Average annual income <50,000 CNY | 48 (68.58) | 50 (71.43) | 49 (70.00) | 14 (73.68) | 5 (71.43) | 166 (70.34) | 1.00 |
| Current smoking* | 9 (12.86) | 14 (20.00) | 8 (11.43) | 6 (33.33) | 3 (42.86) | 40 (17.02) | 0.05 |
| Current drinking* | 7 (10.00) | 9 (12.86) | 7 (10.00) | 1 (5.56) | 1 (14.29) | 25 (10.64) | 0.87 |
| Family history of cancer | 45 (64.29) | 44 (62.86) | 46 (65.71) | 14 (73.68) | 3 (42.86) | 152 (64.41) | 0.70 |
| Education | <0.05 | ||||||
| Primary school or below | 31 (44.29) | 20 (28.57) | 43 (61.43) | 10 (52.63) | 4 (57.14) | 108 (45.76) | |
| Secondary education or more | 39 (55.71) | 50 (71.43) | 27 (38.57) | 9 (47.37) | 3 (42.86) | 128 (54.24) | |
| Teeth loss* | 0.12 | ||||||
| ≤3 teeth | 36 (51.43) | 26 (37.14) | 30 (42.86) | 6 (33.33) | 1 (14.29) | 99 (42.13) | |
| ≤11 teeth | 23 (32.86) | 20 (28.57) | 17 (24.29) | 6 (33.33) | 2 (28.57) | 68 (28.94) | |
| ≥12 teeth | 11 (15.71) | 24 (34.29) | 23 (32.86) | 6 (33.33) | 4 (57.14) | 68 (28.94) | |
| Rice (1−3 d/week)*,# | 53 (75.71) | 55 (78.57) | 55 (78.57) | 11 (61.11) | 5 (71.43) | 179 (76.17) | 0.57 |
| Wheaten food (4−6 d/week)*,# | 47 (67.14) | 50 (71.43) | 47 (67.14) | 10 (55.56) | 2 (28.57) | 156 (66.38) | 0.19 |
| Coarse grains (Every day)*,# | 50 (71.43) | 57 (81.43) | 56 (80.00) | 10 (55.56) | 4 (57.14) | 177 (75.32) | 0.09 |
| Meat (1−3 d/month)# | 30 (42.86) | 24 (34.29) | 22 (31.43) | 8 (42.11) | 4 (57.14) | 88 (37.29) | 0.45 |
| Poultry (Never)# | 69 (98.57) | 68 (97.14) | 70 (100) | 19 (100) | 7 (100) | 233 (98.73) | 0.84 |
| Sea food (Never)# | 70 (100) | 68 (97.14) | 70 (100) | 19 (100) | 7 (100) | 234 (99.15) | 0.47 |
| Eggs (1−3 d/week)# | 29 (41.43) | 25 (35.71) | 25 (35.71) | 10 (52.63) | 2 (28.57) | 91 (38.56) | 0.64 |
| Vegetables (Every day)# | 66 (94.29) | 69 (98.57) | 70 (100) | 18 (94.74) | 7 (100) | 230 (97.46) | 0.18 |
| Fruits (1−3 d/month)# | 31 (44.29) | 27 (38.57) | 22 (31.43) | 9 (47.37) | 5 (71.43) | 94 (39.83) | 0.20 |
| Bean products (1−3 d/week)# | 36 (51.43) | 35 (50.00) | 39 (55.71) | 10 (52.63) | 5 (71.43) | 125 (52.97) | 0.85 |
| Salty degree (Medium)*,# | 51 (72.86) | 53 (75.71) | 54 (77.14) | 15 (83.33) | 4 (57.14) | 177 (75.32) | 0.70 |
| Spicy food (Never)*,# | 55 (78.57) | 53 (75.71) | 59 (84.29) | 17 (94.44) | 5 (71.43) | 189 (80.43) | 0.70 |
| Hot food (Never)# | 68 (97.14) | 69 (98.57) | 66 (94.29) | 18 (94.74) | 6 (85.71) | 227 (96.19) | 0.24 |