Table 3: Unadjusted geometric means with 95% confidence interval in ng/dL by blood draw session for males by age, smoking status, and race/ethnicity. Data from National Health and Nutrition Examination Survey 2011-2012.

Blood Draw Session

Statistically Significant Differences

Smoking Status

Morning (M)

Afternoon (A)

Evening (E)

Nonsmokers

Age: 12-19 Years old

Total

313.5 (269.4-364.9)

195.5 (143.8-265.9)

167.5 (107.1-262)

M > A (p < 0.01), M > E (p < 0.01)

Non-Hispanic White

303.1 (226.2-406.1)

155.4 (80-301.9)

139.5 (69.8-278.9)

M > E (p < 0.01)

Non-Hispanic Black

338.1 (285.9-399.9)

260.5 (177.1-383.2)

269.6 (192.3-377.8)

Hispanic

323.6 (246.6-424.6)

232.6 (191.2-282.9)

213.2 (138.7-327.8)

M > E (p  =  0.055)

Non-Hispanic Asian

399.8 (335-477.3)

244.5 (164.5-363.2)

260.2 (155.9-434.4)

M > A (p  =  0.04)

Other Race/Ethnicities

203.8 (133.6-311.1)

279.1 (187.6-415.4)

143.6 (84.6-243.6)

Smokers

Age: 12-19 Years old

Total

492 (421.8-573.9)

440 (327.7-590.8)

341.3 (226.3-514.8)

Non-Hispanic White

508.1 (417.7-618.1)

499.3 (344.1-724.5)

330.9 (169.6-645.8)

Non-Hispanic Black

499.5 (434.8-573.9)

743.7 (679.8-813.6)

247.1 (150.5-405.7)

A > M > E (p < =  0.02)

Hispanic

397.8 (140.6-1125.7)

273.1 (161.9-460.8)

553.3 (374.7-817)

Non-Hispanic Asian

209.4 (2.9-15141.3)

365.8 (365.8-365.8)

No data

Other Race/Ethnicities

598.7 (473.7-756.6)

452.9 (452.9-452.9)

357.9 (357.9-357.9)

M > A (p  =  0.04), M > E (p  =  0.01)

Nonsmokers

Age: ≥ 20 Years old

Total

382 (360.9-404.3)

325.7 (301.1-352.2)

317 (288.2-348.6)

M > A (p < 0.01), M > E (p < 0.01)

Non-Hispanic White

383.5 (356.5-412.5)

321.2 (290-355.8)

313.3 (281.8-348.5)

M > A (p < 0.01), M > E (p < 0.01)

Non-Hispanic Black

323 (280.8-371.4)

342.7 (317.4-370.1)

344 (282.1-419.5)

Hispanic

393.5 (368.8-419.8)

327 (302.5-353.5)

324.5 (275.7-381.8)

M > A (p < 0.01), M > E (p  =  0.03)

Non-Hispanic Asian

402.4 (378.5-427.8)

339.3 (314.4-366.2)

332.2 (297-371.6)

M > A (p < 0.01), M > E (p < 0.01)

Other Race/Ethnicities

378 (317.4-450)

322.2 (192.6-539.3)

284.7 (172.9-468.8)

Smokers

Age: ≥ 20 Years old

Total

412.7 (392.7-433.6)

408.7 (385.1-433.7)

343.1 (299.4-393.1)

M > E (p < 0.01), A > E (p  =  0.03)

Non-Hispanic White

396.7 (375-419.8)

415.3 (380.8-453)

323.4 (264.6-395.4)

M > E (p  =  0.03), A > E (p  =  0.02)

Non-Hispanic Black

457.5 (422.4-495.4)

403.8 (352.9-462.1)

407.8 (339.3-490)

M > A (p  =  0.04)

Hispanic

458.5 (360.3-583.4)

379.8 (320.4-450.3)

370.8 (314.2-437.6)

Non-Hispanic Asian

490.5 (430.2-559.2)

364 (300.4-441.2)

406.2 (316.3-521.6)

M > E (p < 0.01)

Other Race/Ethnicities

440.4 (345.4-561.6)

430.5 (334.8-553.4)

293.2 (192.2-447.1)

A > E (p  =  0.01)