Table 2.
Sleeping habits in male and female bruxers and nonbruxers among dental students in Saudi Arabia.
| Sleeping habits | MB | M-NB | χ 2 | p value | FB | F-NB | χ 2 | p value | |
|---|---|---|---|---|---|---|---|---|---|
| How many hours do you sleep every night? | 3–6 h | 8% (2) | 13.2% (5) | 0.79 | 0.85 | 24.5% (34) | 37.8% (120) | 19.3 | 0.001∗ |
| 6–9 h | 48% (12) | 42.1% (16) | 39.5% (55) | 44.2% (140) | |||||
| More than 9 h | 44% (11) | 44.7% (17) | 36% (50) | 18% (57) | |||||
| Total | 100% (25) | 100% (38) | 100% (139) | 100% (317) | |||||
|
| |||||||||
| Do you have a fixed time of going to bed every night? | Yes | 20% (5) | 22% (9) | 0.04 | 0.55 | 30.5% (43) | 30.3% (98) | 0.001 | 0.24 |
| No | 80% (20) | 78% (32) | 69.5% (98) | 69.7% (225) | |||||
| Total | 100% (25) | 100% (41) | 100% (141) | 100% (323) | |||||
|
| |||||||||
| Approximately when do you go to bed every night? | Before 12 o'clock | 0% (0) | 10% (1) | 4.74 | 0.32 | 43.1% (22) | 36.6% (42) | 9.39 | 0.67 |
| At 12 o'clock | 100% (9) | 60% (6) | 47.1% (24) | 41.7% (48) | |||||
| After 12 o'clock | 0% (0) | 30% (3) | 9.8% (5) | 21.7% (25) | |||||
| Total | 100% (9) | 100% (10) | 100% (51) | 100% (115) | |||||
|
| |||||||||
| How long do you take to fall asleep every night? | 30 min or less | 47.6% (10) | 74.1% (20) | 6.81 | 0.45 | 48% (60) | 58.6% (164) | 12.36 | 0.19 |
| 60 min or more | 52.4% (11) | 25.9% (7) | 52% (65) | 41.4% (116) | |||||
| Total | 100% (21) | 100% (27) | 100% (125) | 100% (280) | |||||
|
| |||||||||
| How many naps do you take during the day? | No naps | 16% (4) | 21.9% (9) | 2.82 | 0.59 | 6.5% (9) | 7.6% (24) | 5.54 | 0.24 |
| One nap | 44% (11) | 48.8% (20) | 68.1% (94) | 57.4 (182) | |||||
| More than one nap | 40% (10) | 29.3% (12) | 25.4% (35) | 35% (111) | |||||
| Total | 100% (25) | 100% (21) | 100% (138) | 100% (317) | |||||
|
| |||||||||
| What is the duration of your daytime naps? | 1-2 h or less | 19% (4) | 46.4% (13) | 10.39 | 0.03 | 37.2% (45) | 36.7% (94) | 27.3 | 0.000∗ |
| 2-3 h | 19% (4) | 10.7% (3) | 5.8% (7) | 26.2% (67) | |||||
| Total | 100% (21) | 100% (28) | 100% (121) | 100% (256) | |||||
∗ p < 0.05.