Change in renal function after sodium phosphate preparation for screening colonoscopy

Table 3 Multivariate linear regression model on change in creatinine and GFR from baseline to 12-24 mo

Variable	Creatinine (R2 = 0.016)		GFR (R2 = 0.053)
	Correlation coefficient (95% CI)	P	Correlation coefficient (95% CI)	P
Baseline	-0.018 (-0.057 to 0.021)	0.366	-0.135 (-0.187 to -0.083)	< 0.001
Group effect (NaP, PEG and control groups)	0.002 (-0.004 to 0.009)	0.489	-0.247 (-0.685 to 0.191)	0.269
Age at baseline creatinine and GFR measurement	0.000 (0.000 to 0.001)	0.433	-0.036 (-0.077 to 0.006)	0.094
Hypertension	0.007 (-0.009 to 0.023)	0.365	-0.748 (-1.774 to 0.277)	0.152
Diabetes mellitus	-0.016 (-0.034 to 0.002)	0.079	1.082 (-0.076 to 2.240)	0.067
Body mass index	0.001 (-0.001 to 0.003)	0.208	-0.038 (-0.162 to 0.086)	0.545
Serum phosphate	-0.001 (-0.004 to 0.003)	0.733	0.020 (-0.205 to 0.246)	0.859