By structural groups, AORs were elevated about 50% for fourth quartile levels of metals and chlorinated solvents (Table 3), and the AOR was also elevated for the third quartile level of metals.
In contrast, there was no evidence of IQ having any effect on mortality in women (adjusted HR for fourth quartile v first quartile 1.09 (95% CI 0.68 to 1.79) v 1.00 (ref); table 4).
The median WBC count for first quartile was 0 cells/μL (IQR 0 – 1.0) while that for the remaining subjects was 2.0 cells (IQR 0 – 8.3 cells) (p = 0.009; t-test).
Results: Across all countries, adjusting for seasonality, PM2.5 was not associated with preterm birth, but was associated with low birth weight [odds ratio (OR) = 1.22; 95% CI: 1.07, 1.39 for fourth quartile of PM2.5 (> 20.2 μg/m) compared with the first quartile (< 6.3 μg/m)].
When father's and own educational attainment was adjusted for, the mortality risk was highest in the 25% of women with the highest cognitive ability (adjusted HR for first quartile v fourth quartile 1.00 (ref) v 0.80 (95% CI 0.48 to 1.34)).
Similarly in a nested case control study of 592 lung cancer patients and 670 controls pre-diagnostic elevated C-reactive protein was found to be associated with increased risk of lung cancer development (odds ratio [OR], 1.98; 95% CI, 1.35 to 2.89; P-trend < .001 for fourth quartile [Q4, ≥5.6 mg/L] v Q1 [< 1.0 mg/L]) [ 14].
Eagleman had promised that the results would be kept anonymous, but he'd programmed each battery of tests to end with a cheeky evaluation: "You're a rock star," for those who scored in the top twenty-five per cent; "Ready for the big time," for the second quartile; "Ready for open-mike night," for those in the next group; and "Go back to band camp," for the bottom quarter.
Film smoking exposure was then classified into quartiles with the following cut-offs: 1 139 occurrences for the lowest quartile, 140 201 for the second quartile, 202 286 for the third quartile and 287 568 for the highest quartile.
This is true for three vertebrates and possibly for Drosophila, except for the second quartile in human, which exhibited a U-shaped age dependence.
The ORs were 1.9 for the second quartile, 1.9 for the third quartile and 3.4 for the highest quartile in comparison with the lowest quartile (trend test, P = 0.06).
Average BMI by quartile of NRP ranged from 18.1 ± 3.2 kg/m for the lowest quartile to 18.7 ± 3.6 kg/m for the second quartile, without evidence for a dose response relationship.
