Table 3.

Correlates between ADR reporting rates and PCT variables

PCT variable	ADR reports per million population*	ADR reports per million population (square root +2 transform) for ‘top drugs’
Prescriptions per thousand population	rs=−0.413, P < 0.05 95% CI −0.673, −0.062	r=−0.420, P < 0.05 95% CI −0.678, −0.071
Percentage of male GPs within PCT	rs=−0.482, P < 0.01 95% CI −0.717, −0.147	r=−0.50, P < 0.01 95% CI −0.729, −0.171
Percentage of single handed practitioners	rs=−0.734, P < 0.001 95% CI −0.865, −0.508	r=−0.663, P < 0.001 95% CI −0.826, −0.398
Average list size	rs=−0.519, P= 0.003 95% CI −0.741, −0.196	r=−0.434, P < 0.05 95% CI −0.687, −0.088
Proportion of GPs over 55 years of age (square root transform)	rs=−0.566, P < 0.01 95% CI −0.769, −0.258	r=−0.485, P < 0.01 95% CI −0.720, −0.151
Average total QOF points	rs= 0.484, P < 0.01 95% CI 0.150, 0.719	r= 0.491, P < 0.01 95% CI 0.158, 0.723
Overall deprivation score*	rs=−0.550, P < 0.01 95% CI −0.760, −0.236	rs=−0.570, P < 0.01 95% CI −0.769, −0.258
Proportion of population over 65 years of age*	rs= 0.147, P= 0.438 95% CI −0.225, 0.482	rs= 0.128, P= 0.502 95% CI −0.244, 0.466

^*Non-parametric r_s= Spearman's ranking correlation (r_s), two tailed. r= Pearson's correlation (r), two tailed.