Erratum: Retrograde intrarenal surgery for renal stones in children <5 years of age.

[This corrects the article on p. 48 in vol. 37, PMID: 33850355.]. Copyright:

The authors Chandramohan V, Siddalingaswamy PM, Ramakrishna P, Soundarya G, Manas B, Hemnath A of the article titled “Retrograde intrarenal surgery for renal stones in children <5 years of age”, published on pages 48-53, Issue 1, Volume 37 of Indian Journal of Urolog,[1] have requested for corrections in the published manuscript due to inadvertent errors in submission.

The sentence “In the multivariable model, the most significant factors were the location of the stone in the middle and lower calyx and the higher stone density.” may be read as “In the multivariable model, the most significant factors were the location of the stone in the middle and lower calyx.” on page 50, under 5th paragraph of Results section.

The sentence “In the multivariable model, the most significant factors were the stone size, lower calyx, and the higher stone density.” may be read as “In the multivariable model, the most significant factors were the stone size and lower calyx.” on page 50, under 6th paragraph of Results section.

The sentence “”Erkurt et al.[11] had reported an overall complication rate of 27.7% but they did not use the Clavien system, and long term follow up was not available.” may be read as “Erkurt et al.[11] had reported an overall complication rate of 27.7% using the Clavien system, but long term follow up was not available.” on page 52 and 53, under 7th paragraph of Discussion section.

In Table 1, Left Side cases may be read as 33 instead of 38; the percentages have been deleted. The table legend and table number are correct. The correct Table 1 is mentioned below:

Table 1

Demographic and stone details

Variables	Number of cases (%)	Mean±SD
Age (months)
0-12	2 (3.2)	42.11±12.8
13-24	4 (6.4)
25-36	12 (19.3)
37-48	21 (33.8)
49-60	23 (37.0)
Sex (n=62)
Male	40 (64.5)
Female	22 (35.5)
Side (n=67)
Right	24
Left	33
Bilateral	5
Weight (kg)	Range (6-16.3 kg)	13.31±1.9
Number of renal units with
Single stone	60
Multiple stone	7
Stone location (n=74)
Pelvis	28 (37.8)
Upper ureter	12 (16.2)
Upper calyx	7 (9.4)
Middle calyx	10 (13.5)
Lower calyx	17 (22.9)
Stone size (mm)	Range (7.3-18.2)	11.9±2.7
HU		920.4±420.1

HU: Hounsfield units, SD: Standard deviation

In Table 2, Residual stones ¬>2 mm may be read as 14 (23.7%) instead of 9 (15.3%). The table legend and table number are correct. The correct Table 2 is mentioned below:

Table 2

Operative and postoperative details

Variables	Range	Number of cases (%)	Mean±SD
Operative time (min)	36.4-80.5		55.2±11.4
Lasering time (min)			42.3±15.6
Access sheath used in (n=63)		40 (63.5)
Hospital stay (h)	40.4-83.2		62.1±11.1
Successful retrograde ureteral access failure (n=67)		4 (5.97)
Lost to follow up (n=62)		4 (6.45)
Residual stone ≥2 mm (n=59)		14 (23.7%)
Stone free rate (n=59)		45 (76.3)
Stone composition
Calcium oxalate monohydrate		10 (15.8)
Calcium oxalate dehydrate		14 (22.2)
Uric acid		11 (17.4)
Mixed type		28 (44.4)
Metabolic abnormalities
Hypocitratuira		5
Hypercalciuria		3
Intraoperative complications where RIRS was done (n=63)
Ureteric damage
Grade 1	1 (1.58)
Grade 2		1 (1.58)
Postoperative complications (n=63)
G1		18 (28.5)
G2		2 (3.17)
G3a		0
G3b		4 (6.43)

RIRS: Retrograde intrarenal surgery, SD: Standard deviation