The frequency distributions of the miners in the different age categories and duration of employment categories were very different in the two population groups.
Some confidence intervals were wide, making estimates in these specific duration-of-use categories less precise.
One-way ANOVA with duration-of-care category as the independent variable did not show any significant differences (F2,196 = 0.039, p = 0.99, Eta squared = 0.001, Figure 4).
The liver cancer elevation persisted across duration of employment categories but did not increase with duration of employment.
The proportions of waste pickers and control group workers were equal across the duration of work categories.
If a study reported multiple estimates for independent subpopulations, for instance according to job classification, duration of exposure categories, or gender, these were reported in " Appendix 1".
The second multivariable model (model 2) controlled for the duration of sleep categories, for the purpose of evaluating the association between difficulty initiating or maintaining sleep and the risk of developing diabetes.
No differences were observed between genders, age groups, duration of disease categories, age at diagnosis, diagnostic difficulties (previous misdiagnoses and delays in making the diagnosis) or symptomatology at the time of diagnosis (data not shown).
None of the rates observed in any duration of use category was materially different from those observed in never-users.
The intestinal cancer elevation among women persisted in each duration of employment category but did not increase with duration of employment.
Previously undetected cases of DM presenting in HEs may partly explain why this is so, since this group of patients fall under the low duration of DM category.
