Table 2.
General characteristics by questionnaire score.
| Variable [ n (%)] | PSQI (n=300)* | ESS (n=471)* | BQ (n=544)* | ||||||
|---|---|---|---|---|---|---|---|---|---|
| <5 | >5 | p-value | <10 | >10 | p-value | Low risk | High risk | p-value | |
| Age | |||||||||
| <16 | 3 (75) | 1 (25) | 0.02 | 2 (40) | 3 (60) | 0.69 | 5 (100) | 0 (0) | 0.38 |
| 16-18 | 38 (47) | 42 (53) | 46 (38) | 75 (62) | 125 (91) | 13 (9) | |||
| 19-21 | 48 (30) | 113 (70) | 86 (35) | 158 (65) | 251 (92) | 23 (8) | |||
| 22-24 | 13 (27) | 35 (73) | 24 (28) | 61 (72) | 87 (85) | 16 (15) | |||
| >25 | - | 2 (100) | 3 (37) | 5 (63) | 7 (88) | 1 (12) | |||
| ND | 1 (20) | 4 (80) | 4 (50) | 4 (50) | 15 (94) | 1 (6) | |||
| Gender | |||||||||
| Male | 42 (38) | 68 (62) | 0.25 | 73 (42) | 100 (58) | 0.036** | 167 (85) | 30 (15)# | 0.028** |
| Female | 52 (31) | 118 (69) | 75 (29) | 184(71) | 275 (93) | 21 (7)# | |||
| ND | 9 (45) | 11 (55) | 17 (44) | 22 (56) | 48 (94) | 3 (6) | |||
| Currently working | |||||||||
| Yes | 2 (20) | 8 (80) | 0.62 | 4 (40) | 6 (60) | 0.94 | 14 (93) | 1 (7) | 0.80 |
| No | 100 (35) | 187 (65) | 159 (35) | 296 (65) | 461 (90) | 52 (10) | |||
| ND | 1 (33) | 2 (67) | 2 (33) | 4 (67) | 15 (94) | 1 (6) | |||
| Study stage | |||||||||
| Preclinical | 68 (37) | 117 (63) | 0.26 | 107 (38) | 174 (62) | 0.09 | 297 (91) | 28 (9) | 0.21 |
| Clinical | 35 (30) | 80 (70) | 58 (30) | 132 (70) | 193 (88) | 26 (12) | |||
*
Available complete questionnaires.
**
Significant after Bonferroni's correction.
#
After a significant p-value by Chi square test was obtained, Fisher's exact test was performed to determine which subgroups differed significantly.
**Values were calculated on available questionnaires for both variables.
Abbreviations: PSQI Pittsburgh Sleep Quality Index; ESS Epworth Sleepiness Scale; BQ Berlin Questionnaire; ND No data