Table 5.
Interaction between computer exposure variables and mobile phone use at baseline, and sleep disturbances (new cases) at 1-year follow-up
| |
MEN |
WOMEN |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mobile phone use |
Mobile phone use |
|||||||||||
| Low | Medium | High | Low | Medium | High | |||||||
| Computer exposure |
Cases (%) |
PR (95% CI) |
Cases (%) |
PR (95% CI) |
Cases (%) |
PR (95% CI) |
Cases (%) |
PR (95% CI) |
Cases (%) |
PR (95% CI) |
Cases (%) |
PR (95% CI) |
|
Computer use |
|
|
|
|
|
|
|
|
|
|
|
|
| High |
38 (16) |
2.2 (1.03–4.55) |
17 (19) |
2.9 (1.32–6.34) |
14 (22) |
3.4 (1.55–7.63) |
47 (21) |
1.2 (0.84–1.66) |
18 (19) |
1.1 (0.69–1.76) |
36 (34) |
1.8 (1.28–2.51) |
| Medium |
32 (14) |
2.1 (1.00–4.32) |
16 (21) |
3.2 (1.47–7.16) |
17 (24) |
3.9 (1.81–8.44) |
57 (17) |
1.0 (0.70–1.34) |
19 (15) |
0.8 (0.52–1.33) |
17 (15) |
0.8 (0.50–1.29) |
| Low |
8 (6) |
1.0 (ref) |
8 (10) |
1.7 (0.69–4.38) |
9 (15) |
2.4 (1.00–5.90) |
68 (19) |
1.0 (ref) |
36 (25) |
1.3 (0.94–1.92) |
24 (23) |
1.1 (0.75–1.72) |
|
Email/chat use |
|
|
|
|
|
|
|
|
|
|
|
|
| High |
11 (23) |
1.8 (0.96–3.31) |
9 (32) |
2.9 (1.66–5.24) |
7 (32) |
2.9 (1.47–5.59) |
14 (29) |
1.7 (1.06–2.68) |
7 (28) |
1.7 (0.88–3.08) |
31 (31) |
1.7 (1.08–2.68) |
| Medium |
18 (16) |
1.4 (0.82–2.25) |
9 (20) |
1.8 (0.96–3.46) |
4 (10) |
… |
30 (19) |
1.1 (0.78–1.61) |
19 (24) |
1.4 (0.92–2.12) |
23 (26) |
1.5 (0.99–2.13) |
| Low | 49 (11) | 1.0 (ref) | 23 (14) | 1.3 (0.82–2.08) | 29 (22) | 2.2 (1.41–3.34) | 126 (18) | 1.0 (ref) | 47 (18) | 1.0 (0.75–1.37) | 39 (21) | 1.1 (0.78–1.47) |
Participants who reported symptoms at baseline were excluded from analysis of the mental health outcome concerned. Prevalence of mental health symptoms (cases and %) at 1-year follow-up in each exposure category is shown. The prevalence ratios (PRs) with 95 % confidence intervals (CIs) were adjusted for relationship status, educational level, and occupation. PRs with a CI not including 1.00 (before rounding) are given in bold. Results of analyses with fewer than five cases are not presented, indicated as “…”.