Table 7: The ratios of the unadjusted geometric means (RU) and adjusted geometric means (RA) for total TST levels for morning to evening session by age, race/ethnicity, and smoking status. Data from National Health and Nutrition Examination Survey 2011-2012.

Smoking Status		N
Nonsmokers	Age: 12-19 Years old	Morning	Afternoon	Evening	RU	RA
	Total	232	117	77	1.87	1.85
	Non-Hispanic White	52	33	18	2.17	2.06
	Non-Hispanic Black	77	53	13	1.25	1.34
	Hispanic	63	54	25	1.52	1.45
	Non-Hispanic Asian	32	26	15	1.54	1.3
	Other Race/Ethnicities	8	11	6	1.42	2.14
Smokers	Age: 12-19 Years old
	Total	40	17	10	1.44	1.84
	Non-Hispanic White	14	7	4	1.54	2.02
	Non-Hispanic Black	18	3	3	2.02	1.82
	Hispanic	3	5	2	0.72	1.07
	Non-Hispanic Asian	3	1	0	0.57	2.47
	Other Race/Ethnicities	2	1	1	1.67	0.81
Nonsmokers	Age: ≥ 20 Years old
	Total	844	610	231	1.21	1.2
	Non-Hispanic White	317	204	95	1.22	1.21
	Non-Hispanic Black	152	161	47	0.94	1
	Hispanic	205	125	52	1.21	1.2
	Non-Hispanic Asian	150	98	29	1.21	1.17
	Other Race/Ethnicities	20	22	8	1.33	1.62
Smokers	Age: ≥ 20 Years old
	Total	348	264	110	1.20	1.23
	Non-Hispanic White	161	105	39	1.23	1.31
	Non-Hispanic Black	94	96	34	1.12	1.03
	Hispanic	56	32	20	1.21	1.17
	Non-Hispanic Asian	27	21	11	1.07	1.08
	Other Race/Ethnicities	10	10	6	1.50	1.22