Exact(6)
Furthermore, CCN2 levels were not associated with clinical events or all-cause mortality in Cox regression models, neither when analysed in quartiles nor dichotomised at median (Table 4).
Similar results were obtained when the AAs were analysed in quartiles (see ESM Table 1).
Cumulative use of wireless phones was analysed in quartiles, Table 5.
No significant relationship between body fat, measured either by weight, Quetelet's index, triceps skinfold or subscapular skinfold, and breast cancer risk was found when analysed in quartiles.
Cumulative use of the phone types was analysed in quartiles based on use of wireless phones in total among the controls (first quartile >39-405 h, second quartile 406 1,091 h, third quartile 1,092-2,376 h, fourth quartile >2,376 h).
These results seemed to be in contrast with the significant positive association between fatness, analysed in quartiles, and breast cancer observed in a cross-sectional study, based on mammographic screening, carried out previously in the same population.
Similar(54)
We also conducted analyses in FNRS quartiles and quintiles.
Linear regression models were used in the crude and adjusted analyses using all exposures in quartiles to assess possible dose-response.
In joint-based analyses using ln Pb in quartiles (with the lowest quartile, mean Pb 0.94 ± 0.20 μg/dl, as the reference category), the highest quartile of ln Pb (mean Pb, 4.92 ± 3.93 μg/dl) was associated with a 27% increase in the odds of having knee rOA and 34% higher odds of having more severe rOA (Table 4).
22 Exposure was therefore categorised in quartiles, and analyses were repeated.
In the individual analyses, study subjects were categorized in quartiles of the distribution among controls of each POP.
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