Table 3. Independent variables, number of respondents for each survey group, statistical test used, and adjusted p-values using the Benjamini-Hochberg procedure.
| Independent variable | Number of respondents | Test | p-value | |
|---|---|---|---|---|
| pre-COVID | COVID | |||
| Hours of sleep per night | 721 | 506 | Pearson Chi-Square Test, Chi-square = 29.890, DF = 6 | 0.0001* |
| Average time going to bed | 721 | 506 | Pearson Chi-Square Test, Chi-square = 22.942, DF = 4 | 0.0001* |
| Do you work? | 721 | 506 | Pearson Chi-Square Test, Chi-square = 3.452, DF = 1 | 0.0632 |
| Average hours worked per week | 395 | 251 | Pearson Chi-Square Test, Chi-square = 5.510, DF = 5 | 0.3568 |
| Physical activity (aerobic exercise) | 693 | 500 | Kruskal–Wallis Rank Sums Test, Chi-square = 9.3421, DF = 1 | 0.0022* |
| Strength training | 693 | 500 | Kruskal–Wallis Rank Sums Test, Chi-square = 2.2429, DF = 1 | 0.1342 |
| Consumption of vegetables | 693 | 498 | Pearson Chi-Square Test, Chi-square = 1.591, DF = 4 | 0.8104 |
| Consumption of fruit | 692 | 498 | Pearson Chi-Square Test, Chi-square = 2.726, DF = 4 | 0.6046 |
| Breakfast consumption | 692 | 499 | Kruskal–Wallis Rank Sums Test, Chi-square = 7.7713, DF = 1 | 0.0053* |
| Eating fast food Yes/No | 693 | 497 | Pearson Chi-Square Test, Chi-square = 4.513, DF = 1 | 0.0336 |
| Fast food consumption | 693 | 497 | Pearson Chi-Square Test, Chi-square = 4.417, DF = 3 | 0.2198 |
| Drinking coffee Yes/no | 690 | 500 | Pearson Chi-Square Test, Chi-square = 3.219, DF = 1 | 0.0728 |
| Coffee consumption | 690 | 500 | Pearson Chi-Square Test, Chi-square = 5.229, DF = 3 | 0.1558 |
| Time spent watching TV, movies, reading news online | 721 | 505 | Pearson Chi-Square Test, Chi-square = 23.071, DF = 6 | 0.0008* |
| Time spent playing video or computer games | 718 | 506 | Pearson Chi-Square Test, Chi-square = 36.963, DF = 6 | 0.0001* |
| Vaping | 236 | 185 | Kruskal–Wallis Rank Sums Test, Chi-square = 11.3200, DF = 1 | 0.0008* |
| Drinking alcohol Yes/No | 523 | 499 | Pearson Chi-Square Test, Chi-square = 65.505, DF = 1 | 0.0001* |
| Alcohol consumption | 523 | 499 | Pearson Chi-Square Test, Chi-square = 6.649, DF = 4 | 0.1556 |
| Marijuana use | 292 | 500 | Kruskal–Wallis Rank Sums Test, Chi-square = 15.6320, DF = 1 | 0.0001* |
| Difficulties concentrating | 633 | 502 | Pearson Chi-Square Test, Chi-square = 77.283, DF = 1 | 0.0001* |
| Feeling sad or hopeless | 625 | 502 | Pearson Chi-Square Test, Chi-square = 5.686, DF = 1 | 0.0171* |
| Considered suicide | 619 | 491 | Pearson Chi-Square Test, Chi-square = 0.259, DF = 1 | 0.6108 |
| Number of times suicide considered | 78 | 59 | Pearson Chi-Square Test, Chi-square = 1.399, DF = 3 | 0.7057 |
| Planned suicide | 78 | 59 | Pearson Chi-Square Test, Chi-square = 2.762, DF = 3 | 0.0965 |
| Attempted suicide | 34 | 36 | Pearson Chi-Square Test, Chi-square = 0.229, DF = 1 | 0.6324 |
Notes.
*
Denotes statistical significance.