Table 1.

Comparisons of the parameters of age, the stone size, and the body mass index between the two groups of patients with staghorn calculi in Alzahra Hospital between 2014 and 2017

Parameter	Intervention group	Control group	P value
Age
1	42.80±15.10	43.60±14.30	0.85
2	41.10±13.20	41.50±13.34	0.90
Stone size
1	4.20±0.30	4.00±0.27	0.17
2	2.40±0.57	2.55±0.69	0.37
Body mass index
1	25.67±1.54	25.10±1.81	0.06
2	23.70±1.90	24.70±1.43	0.16

1: stone size>4 cm; 2: stone size<4 cm