Points | ||
---|---|---|
Part 1. Sampling and representativeness | ||
1. Sampling method | ||
A | Non-probability sampling (including: purposive, quota, convenience and snowball sampling) | 0 |
B | Probability sampling (including: simple random, systematic, stratified g, cluster, two-stage and multi-stage sampling) | 1 |
2. Was the response rate reported? | ||
A | Not reported | 0 |
B | Response rate below 50% | 0 |
C | Response rate at 50% or above | 1 |
3. Are the individuals selected to participate in the study likely to be representative of the target population? | ||
A | No | 0 |
B | Yes | 1 |
4. Selection bias: Is there a risk of selection bias caused by the inadequate selection of participants | ||
A | High risk | 0 |
B | Low risk | 1 |
5. Is the sample size adequate for establishing relationships (assumption of statistical power) | ||
A | No | 0 |
B | Yes | 1 |
Part 2. Measurement and confounders | ||
6. How was workplace bullying measured? | ||
A | Self-labeling without definition of the bullying concept | 0 |
B | Self-labeling with a definition of the bullying concept | 1 |
C | Behavioral checklist (e.g., NAQ, LIPT) | 1 |
7. How was sleep (complaints) assessed? | ||
A | Self-report | 0 |
B | Objective measurement | 1 |
8. Performance bias: Is there a risk of performance bias caused by the inadequate measurement of exposure | ||
A | High risk | 0 |
B | Low risk | 1 |
9. Are the statistical methods appropriate for the study design? | ||
A | No/Cannot tell | 0 |
B | Yes | 1 |
10. Were meaningful demographic covariates included? | ||
A | No | 0 |
B | Yes | 1 |
11. Were other work factors adjusted for? | ||
A | No | 0 |
B | Yes | 1 |
12. Is the study design cross-sectional or prospective (with time-lag)? | ||
A | Cross-sectional | 0 |
B | Prospective | 1 |
13. Was previous sleep (complaints) adjusted for in prospective analyses? | ||
A | No | 0 |
B | Yes | 1 |
14. Confounder bias: Is there a risk of bias caused by the inadequate confirmation and consideration of confounding variable | ||
A | High risk | 0 |
B | Low risk | 1 |