Table 2

Pearson’s product-moment correlations between the dextromethorphan metabolic ratio of 0–24 h urine (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	0.909	0.065	9
0–4 h urine	0.8418	0.0006	0.378	0.081	12
0–6 h urine	0.8549	0.0006	0.426	0.075	12
0–8 h urine	0.8550	0.0004	0.441	0.073	12
0–12 h urine	0.8578	0.0004	0.442	0.072	12
1 h plasma	0.9849	0.0001	0.519	0.046	7
1.5 h plasma	0.9722	0.0001	0.222	0.010	10
2 h plasma	0.9634	0.0001	0.192	0.006	10
3 h plasma	0.8666	0.0012	0.146	0.017	10
4 h plasma	0.8139	0.0023	0.142	0.008	11
5 h plasma	0.9446	0.0001	0.097	0.031	9
6 h plasma	0.7895	0.0114	0.137	−0.025	9
8 h plasma	0.9506	0.0036	0.103	−0.006	6
2 h saliva	0.8082	0.0026	0.075	−0.004	11
6 h saliva	0.8180	0.0071	0.028	0.046	9