Table 1 Baseline characteristics of the participants in relation to OHRQoL
Variable a | Total score of OHIP-14 (male, n = 987) | P value b | Total score of OHIP-14 (female, n = 2474) | P value b | ||||
|---|---|---|---|---|---|---|---|---|
= 0 | 1–6 | > 6 | = 0 | 1–6 | > 6 | |||
Participants, no. (%) | 299 (30.3) | 379 (38.4) | 309 (31.3) | 659 (26.6) | 973 (39.3) | 842 (34.0) | ||
Age (years) | 18.8 ± 1.7 | 18.6 ± 1.2 | 18.7 ± 1.4 | 0.050 | 18.3 ± 1.1 | 18.3 ± 1.2 | 18.3 ± 1.2 | 0.606 |
Han ethnicity, no. (%) | 257 (86.0) | 333 (87.9) | 270 (87.4) | 0.753 | 557 (84.5) | 817 (84.0) | 683 (81.1) | 0.147 |
BMI (kg/m2), no. (%) | ||||||||
< 18.5 (underweight) | 43 (14.4) | 54 (14.2) | 52 (16.8) | 132 (20.0) | 183 (18.8) | 191 (22.7) | ||
18.5–24.9 (normal) | 173 (57.9) | 221 (58.3) | 200 (64.7) | 438 (66.5) | 651 (66.9) | 550 (65.3) | ||
≥ 25 (overweight) | 83 (27.8) | 104 (27.4) | 57 (18.4) | 0.047 | 89 (13.5) | 139 (14.3) | 101 (12.0) | 0.250 |
No sibling, no. (%) | 215 (71.9) | 246 (64.9) | 187 (60.5) | 0.012 | 400 (60.7) | 552 (56.7) | 432 (51.3) | 0.001 |
Breakfast consumption ≥ 5 times a week, no. (%) | 233 (77.9) | 279 (73.6) | 213 (68.9) | 0.043 | 527 (80.0) | 741 (76.2) | 589 (70.0) | < 0.001 |
Smoking status, no. (%) | ||||||||
Never | 261 (87.3) | 321 (84.7) | 262 (84.8) | 654 (99.2) | 968 (99.5) | 832 (98.8) | ||
Former | 16 (5.4) | 26 (6.9) | 16 (5.2) | 2 (0.3) | 5 (0.5) | 7 (0.8) | ||
Current | 22 (7.4) | 32 (8.4) | 31 (10.0) | 0.651 | 3 (0.5) | 0 (0.0) | 3 (0.4) | 0.202 |
Current drinkers, no. (%) | 82 (27.4) | 128 (33.8) | 125 (40.5) | 0.003 | 31 (4.7) | 61 (6.3) | 62 (7.4) | 0.106 |
Parental education level ≥ high school, no. (%) | 131 (43.8) | 148 (39.1) | 93 (30.1) | 0.002 | 239 (36.3) | 337 (34.6) | 229 (27.2) | < 0.001 |
Sleep duration (hours/day), no. (%) | ||||||||
< 6 | 77 (25.8) | 93 (24.5) | 97 (31.4) | 117 (17.8) | 231 (23.7) | 206 (24.5) | ||
6–7 | 101 (33.8) | 149 (39.3) | 106 (34.3) | 241 (36.6) | 361 (37.1) | 319 (37.9) | ||
7–8 | 90 (30.1) | 104 (27.4) | 88 (28.5) | 228 (34.6) | 289 (29.7) | 251 (29.8) | ||
> 8 | 31 (10.4) | 33 (8.7) | 18 (5.8) | 0.155 | 73 (11.1) | 92 (9.5) | 66 (7.8) | 0.010 |