Pre- and peri-operative clinical information, physiological observations and outcome measures following flexible ureterorenoscopy (FURS), for the treatment of kidney stones. A single-centre observational clinical pilot-study in 51 patients

Table 6 Associations (correlation) between surgical parameters and patient demographic data (n = 51)

Correlation	R Value	P value (2-tailed)
Age and Stone size	− 0.046	0.791
Age and Hounsfield unit	− 0.014	0.942
Age and Surgical time	0.373 (low positive correlation)	0.014*
Age and Duration of laser	0.205	0.278
Age and BMI	0.208	0.147
Stone size and Hounsfield unit	0.406 (low positive correlation)	0.029*
Stone size and Surgical time	0.084	0.676
Stone size and Duration of laser	0.100	0.683
Stone size and BMI	− 0.129	0.466
Hounsfield unit and Surgical time	0.123	0.567
Hounsfield unit and Duration of laser	− 0.002	0.993
Hounsfield unit and BMI	0.148	0.434
Surgical time and Duration of laser	0.702 (high positive correlation)	< 0.001**
Surgical time and BMI	0.322 (low positive correlation)	0.035*
Duration of laser and BMI	0.180	0.342

Person product-moment correlation coefficient
NB Please refer to Tables 3 and 4 for the representative data used for the above analysis
*Correlation is significant at the 0.05 level (2-tailed)
** Correlation is significant at the 0.01 level (2-tailed)

ISSN: 1471-2490