Table 4 Mean scores of Mood Inventory subcomponents according to overall quartiles of hours of mobile phone use per week stratified by sex
Mood Inventory subcomponents | Hours of mobile phone use per week | P for trenda | P valuesb (ANCOVA) | Bonferroni’s multiple comparison (P < 0.05) | |||
|---|---|---|---|---|---|---|---|
Quartile 1: <10 h/week | Quartile 2: 10–18 h/week | Quartile 3: 19–32 h/week | Quartile 4: ≥33 h/week | ||||
Female | N = 366 | N = 396 | N = 445 | N = 480 | |||
Tension and excitement | 13.7 (3.9) | 13.8 (3.8) | 13.8 (3.8) | 14.3 (3.8) | 0.150 | 0.336 | – |
Refreshing mood | 14.0 (2.8) | 14.0 (2.9) | 14.0 (2.8) | 13.9 (2.8) | 0.440 | 0.842 | – |
Fatigue | 15.6 (4.0) | 15.9 (3.8) | 16.0 (3.7) | 16.6 (3.9) | <0.028 | 0.156 | – |
Depressed mood | 15.5 (4.9) | 15.9 (5.0) | 15.4 (4.6) | 16.4 (4.9) | 0.257 | 0.075 | – |
Anxious mood | 17.5 (5.0) | 17.9 (4.7) | 17.5 (4.7) | 18.0 (4.5) | 0.592 | 0.557 | – |
Male | N = 375 | N = 226 | N = 246 | N = 164 | |||
Tension and excitement | 14.0 (4.4) | 13.8 (4.2) | 14.4 (4.1) | 15.6 (4.3) | <0.001 | <0.001 | Quartile 1 vs. quartile 4; quartile 2 vs. quartile 4; quartile 3 vs. quartile 4 |
Refreshing mood | 13.8 (2.8) | 13.8 (2.8) | 13.9 (2.7) | 13.9 (2.5) | 0.841 | 0.995 | – |
Fatigue | 15.2 (4.1) | 15.6 (3.7) | 15.6 (3.7) | 16.5 (4.1) | <0.001 | <0.004 | Quartile 1 vs. quartile 4 |
Depressed mood | 15.3 (5.4) | 14.8 (5.1) | 15.2 (4.8) | 16.8 (5.2) | <0.007 | <0.002 | Quartile 1 vs. quartile 4; quartile 2 vs. quartile 4; quartile 3 vs. quartile 4 |
Anxious mood | 17.4 (5.3) | 16.5 (4.9) | 17.5 (5.0) | 18.4 (4.8) | <0.046 | <0.006 | Quartile 2 vs. quartile 4 |