Table 2.

intra operative and post-operative data

	Group A (n = 85)	Group B (n = 85)	Test of significance
Successful rate of ureteral navigation at first session
Yes	28 (32.9%)	61 (71.8%)	Chi-square test
No	57 (67.1%)	24 (28.2%)	< 0.001*
Total operative time till a stone free status (min)
Min.–Max.	45–105	40–84	Mann–Whitney test
Median (IQR)	66.0 (62.0–79.0)	60.0 (50.0–70.0)	< 0.001*
Laser energy
800	60 (70.6%)	60 (70.6%)	Chi-square test
1200	25 (29.4%)	25 (29.4%)	1
Laser frequency
8	60 (70.6%)	60 (70.6%)	Chi-square test
10	25 (29.4%)	25 (29.4%)	1
Postoperative fever
Yes	4 (4.7%)	2 (2.4%)	Fisher test
No	81 (95.3%)	83 (97.6%)	0.678
Lower urinary tract symptoms
Yes	33 (38.8%)	17 (20.2%)	Chi-square test
No	52 (61.2%)	67 (79.8%)	0.013*
Need for analgesia
Yes	32 (37.6%)	21 (25.0%)	Chi-square test
No	53 (62.4%)	63 (75.0%)	0.108
Gross hematuria
Yes	11 (12.9%)	8 (9.5%)	Chi-square test
No	74 (87.1%)	76 (90.5%)	0.646