Table 2.

Mean Total PEth (μM) (SD) by Age Group and Questionnaire Score or Value

Form-30 average drinks per day			AUDIT-C score
Middle-age adults	Older adults	↔	Middle-age adults	Older adults
0.185 (0.3)	0.151 (0.4)	<1	–	–
0.534 (1.2)	0.249 (0.2)	1	0.207 (0.3)	–
0.874 (1.0)	0.463 (0.3)	2	0.050 (0.1)	0.039 (0.03)
1.66 (1.6)**	0.574 (0.3)	3	0.273 (0.6)	0.051 (0.04)
1.23 (1.1)	0.619 (0.1)	4	0.167 (0.2)	0.147 (0.2)
1.04 (0.7)	–	5	0.280 (0.4)	0.236 (0.1)
1.21 (0.8)	–	6	1.012 (1.8)	0.638 (0.5)
–	–	7	0.40 (0.4)	0.393 (0.3)
2.14 (0.3)	3.912	8	1.74 (1.8)	0.596 (0.3)
–	–	9	1.73 (0.7)	0.437 (0.2)
–	–	10	1.60 (0.8)	2.33 (2.2)
–	–	11	–	–

Center column indicates a value corresponding to questionnaire score: average drinks per day (left side) or AUDIT-C score (right side). Mean total PEth (μM) for each age group and questionnaire value is shown in columns 1, 2, 4, and 5.

^**p < 0.01 for t-test between age groups at a given questionnaire score.