Variable observed correlation Z transform deattenuated correlation Z transform
NAPAP, 1968 (o.d.) 0.19 0.192 0.243 0.248
salicylates, 1968 (mg%) 0.068 0.069 0.108 0.108
Difference between correlations 0.122 0.124 0.135 0.139
(95%CI) (0.051, 0.193) (0.035, 0.235)
se 0.037 0.053
V statistic 3.344 2.64
p-value 0.001 0.008
The V statistic for the observed and deattenuated Pearson correlations is based on (7) and (5), respectively.
Table 5: Observed and deattenuated Pearson Correlations between serum creatinine at baseline (1968) vs. each of NAPAP and salicylates at the baseline clinic visit (1968), Swiss Analgesic Study, n=1168.