Table 1

Pearson’s product-moment correlations between the dextromethorphan metabolic ratio of AUC_∞ (they-axis) and those of other parameters (thex-axis) in the single-dose study

Parameter	Correlation Coefficient	P Value	Slope	Intercept	No.
0–2 h urine	0.7872	0.0118	1.818	0.130	9
0–4 h urine	0.8418	0.0006	0.756	0.162	12
0–6 h urine	0.8549	0.0006	0.851	0.150	12
0–8 h urine	0.8550	0.0004	0.881	0.147	12
0–12 h urine	0.8578	0.0004	0.885	0.144	12
0–24 h urine	1.0000	0.0001	2.000	0.000	12
1 h plasma	0.9849	0.0001	0.259	0.023	7
1.5 h plasma	0.9722	0.0001	0.445	0.019	10
2 h plasma	0.9633	0.0001	0.383	0.012	10
3 h plasma	0.8666	0.0012	0.291	0.035	10
4 h plasma	0.8139	0.0023	0.284	0.015	11
5 h plasma	0.9446	0.0001	0.193	0.063	9
6 h plasma	0.7894	0.0114	0.274	−0.050	9
8 h plasma	0.9506	0.0036	0.206	−0.012	6
2 h saliva	0.8082	0.0026	0.149	−0.007	11
6 h saliva	0.8180	0.0071	0.056	0.091	9