Percutaneous nephrolithotomy is safe and effective in aging male patients: a single center experience

Figures & data

Table 1. Demographic features and stone characterization of the patients stratified by age category.

	Age category
	40–49 (n = 100)	50–59 (n = 83)	60–69 (n = 55)	>70 (n = 45)	p Value
BMI	27.2 ± 4.4	26.9 ± 4.2	28.5 ± 4.8	28.6 ± 4.4	.02*
Hypertension	18 (18%)	16 (19%)	15 (27%)	13 (29%)	.001*
Diabetes mellitus	8 (8%)	8 (10%)	7 (13%)	8 (17%)	.001*
Average stone size (mm^2)	810 ± 490	840 ± 500	845 ± 480	800 ± 460	.02*
Stone Location
Simple stones (n, %)
Isolated pelvis	35 (35%)	28 (33.7%)	16 (29%)	15 (33.3%)
Isolated lower calyces	18 (18%)	15 (18%)	10 (18.1%)	8 (17.7%)
Isolated median calyces	10 (10%)	9 (10.8%)	6 (10.9%)	5 (11.1%)
Isolated upper calyces	8 (8%)	6 (7.2%)	4 (7.2%)	4 (8.8%)
Complex Stones
Choraliform	14 (14%)	11 (13.2%)	8 (14.5%)	7 (15.5%)
Pelvis + lower calyces	10 (10%)	8 (9.6%)	5 (9%)	4 (8.8%)
Pelvis + multiple calyces	5 (5%)	6 (7.2%)	6 (10.9%)	2 (4.4%)
Side (%)
Right	48 (48%)	39 (46.9%)	30 (54.5%)	20 (44.5%)
Left	52 (52%)	40 (48.2%)	22 (40%)	22 (48.9%)
Solitary kidney	6 (6%)	4 (4.9%)	3 (5.5%)	3 (6.6%)
Hydronephrosis Degree
No hydronephrosis or grade-1 hydronephrosis	24 (24%)	20 (24%)	15 (27.2%)	12 (26.6%)
Grades 2–3 hydronephrosis	76 (76%)	63 (76%)	40 (%72.8)	33 (73.4%)
ASA Category
Mean	1.75 ± 0.74	1.89 ± 0.78	2.07 ± 0.75	2.42 ± 0.92	.001*
ASA I	40 (40%)	30 (36.2%)	14 (25.5%)	5 (11.2%)
ASA II	45 (45%)	32 (38.5%)	23 (41.8%)	16 (35.5%)
ASA III	15 (15%)	21 (25.3%)	18 (32.7%)	24 (53.3%)

Note. BMI: body mass index; ASA: American Society of Anesthesiologists. *p < 0.05

Table 2. Intraoperative and postoperative outcomes of the patients stratified by age category.

	Age category
	40–49 (n = 100)	50–59 (n = 83)	60–69 (n = 55)	>70 (n = 45)	p Value
Operation duration (min.) median (min-max)	68.3 (40–108)	64.7 (34–105)	70.3 (42–121)	69.7 (38–118)	.12
Access number median (min-max)	1.5 (1–3)	1.4 (1–3)	1.5 (1–3)	1.4 (1–3)	.28
Perioperative transfusion requiring hemorrhage, n (%)	12 (12%)	11 (13.2%)	8 (14.5%)	6 (13.3%)	.15
Nephrostomy duration (day) median (min-max)	3.2 (3–5)	3.4 (3–5)	3.5 (3–5)	3.0 (2–4)	.08
Hospital stay (day) median (min-max)	3.7 (3–6)	3.1 (2–5)	3.7 (2–7)	3.6 (2–7)	.25
JJ stent requirement, n (%)	10 (10%)	7 (8.4%)	5 (9%)	5 (11.1%)	.07
Stone-Free Rate, n (%)
Initially	82 (82%)	70 (84.3%)	45 (81.8%)	36 (80%)	.04*
Finally	90 (90%)	73 (87.9%)	47 (85.4%)	39 (86.6%)	.12
Clavien Complication Category
1	5 (5%)	5 (6%)	4 (7.2%)	4 (8.8%)	.08
2	6 (6%)	5 (6%)	4 (7.2%)	2 (4.4%)	.09
3A	4 (4%)	3 (3.6%)	2 (3.6%)	1 (2.2%)
3B	1 (1%)	0 (0%)	1 (1.8%)	0 (0%)

*p < 0.05

Figure 1. Preoperative and postoperative sixth-month GFR of the patients stratified by age category.