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. Author manuscript; available in PMC: 2016 May 3.
Published in final edited form as: Walailak J Sci Technol. 2016;13(4):235–242.

Table 1. Characteristics of study participants according to sleep quality and sleep duration categories.

PSQI Categories (number, %) Sleep Duration Categories (number, %)

Good Sleep Quality Poor Sleep Quality P value ≤ 7 hrs > 7 hrs P value
Gender 0.937 0.797
 Missing 1 1 total missing 53
 Men 143 (57.43) 106 (42.57) 178 (75.42) 58 (24.58)
 Women 464 (57.71) 340 (42.29) 584 (76.24) 182 (23.76)
Age 0.779 0.448
 Missing 0 0 total missing 51
 18-20 388 (57.31) 289 (42.69) 498 (76.85) 150 (23.15)
 ≥21 220 (58.20) 158 (41.80) 266 (74.72) 90 (25.28)
Academic Seniority 0.764 0.258
 Missing 0 0 total missing 51
 First to Second year 403 (57.99) 292 (42.01) 511 (77.19) 151 (22.81)
 Third year and above 205 (56.94) 155 (43.06) 253 (73.98) 89 (26.02)
Smoking Behaviors 0.764 0.143
 Missing 0 0 total missing 51
 No 587 (57.72) 430 (42.28) 741 (76.47) 228 (23.53)
 Current 21 (55.26) 17 (44.74) 23 (65.71) 12 (34.29)
Energy Drink Behaviors < 0.01 0.245
 Missing 0 0 total missing 51
 No 312 (62.90) 184 (37.10) 359 (76.06) 113 (23.94)
 Current 285 (52.58) 257 (47.42) 390 (75.58) 126 (24.42)
 Do not know 11 (64.71) 6 (35.29) 15 (93.75) 1 (6.25)
Alcohol Use Behaviors 0.598 0.059
 Missing 0 0 total missing 51
 No 354 (58.32) 253 (41.68) 457 (78.25) 127 (21.75)
 Current 254 (56.70) 194 (43.30) 307 (73.01) 113 (26.90)
Daytime Sleepiness < 0.001 < 0.01
 Missing 1 4 total missing 56
 Normal 477 (61.63) 297 (38.37) 545 (73.85) 193 (26.15)
 Excessive daytime sleepiness 130 (47.10) 146 (52.90) 216 (82.76) 45 (17.24)
General Health Scores < 0.001 0.447
 Missing 6 6 total missing 63
 Normal 526 (64.86) 285 (35.14) 581 (75.45) 189 (24.55)
 Psychological distress 76 (32.76) 156 (67.24) 173 (77.93) 49 (22.07)

Note PSQI Categories scores: Pittsburgh Sleep Quality Index Categories Scores