Table 1. Patients characteristics at initial diagnosisa.
| Variable | All patients | Patients alive | Patients died | P-value |
|---|---|---|---|---|
|
N |
1307 |
1134 |
173 |
|
| Age (years) |
55 (46–63) |
54 (45–62) |
60 (52–66) |
<0.001 |
|
Sex (%) | ||||
| Females | 369 (28.2) | 326 (28.8) | 43 (24.9) | 0.289 |
| Males |
938 (71.8) |
808 (71.3) |
130 (75.1) |
|
| BMI (kg m−2) |
24.6 (22.5–26.6) |
24.8 (22.8–26.7) |
23.1 (21.4–25.4) |
<0.001 |
|
Cigarette smoking (%) | ||||
| Never | 913 (69.9) | 791 (69.8) | 122 (70.5) | 0.838 |
| Ever (former+current) |
394 (30.2) |
343 (30.3) |
51 (29.5) |
|
|
Alcohol (%) | ||||
| Never | 793 (60.7) | 675 (59.5) | 118 (68.2) | 0.029 |
| Ever (former+current) |
514 (39.3) |
459 (40.5) |
55 (31.8) |
|
|
Weight loss (%)b | ||||
| No | 900 (86.5) | 814 (89.5) | 86 (65.7) | <0.001 |
| Yes |
141 (13.5) |
96 (10.6) |
45 (34.4) |
|
|
ASA class (%) | ||||
| <2 | 572 (43.8) | 515 (45.4) | 57 (33.0) | 0.002 |
| ⩾2 |
735 (56.2) |
619 (54.6) |
116 (67.1) |
|
|
Tumour location (%) | ||||
| Right | 637 (48.7) | 565 (49.8) | 72 (41.6) | 0.126 |
| Left | 659 (50.4) | 560 (49.4) | 99 (57.2) | |
| Bilateral |
11 (0.8) |
9 (0.8) |
2 (1.2) |
|
|
Tumour size, cm (%) | ||||
| <5 | 773 (59.1) | 725 (63.9) | 48 (27.8) | <0.001 |
| ⩾5 |
534 (40.9) |
409 (36.1) |
125 (72.3) |
|
|
Nephrectomy type (%) | ||||
| Radical nephrectomy | 1061 (81.2) | 894 (78.8) | 167 (96.5) | <0.001 |
| Partial nephrectomy |
246 (18.8) |
240 (21.2) |
6 (3.5) |
|
|
Pathological tumour stage (%) | ||||
| pT1 | 952 (72.8) | 891 (78.6) | 61 (35.3) | <0.001 |
| pT2 | 166 (12.7) | 125 (11.0) | 41 (23.7) | |
| pT3-4 |
189 (14.5) |
118 (10.4) |
71 (41.0) |
|
|
Fuhrman grade (%)b | ||||
| Low (G1-2) | 634 (49.1) | 585 (51.9) | 49 (29.9) | <0.001 |
| High (G3-4) |
657 (50.9) |
542 (48.1) |
115 (70.1) |
|
|
Symptom presence (%) | ||||
| No | 881 (67.4) | 805 (71.0) | 76 (43.9) | <0.001 |
| Yes |
426 (32.6) |
329 (29.0) |
97 (56.1) |
|
|
Metastasis (%) | ||||
| No | 1229 (94.0) | 1109 (97.8) | 120 (69.4) | <0.001 |
| Yes |
78 (6.0) |
25 (2.2) |
53 (30.6) |
|
|
Laboratory values | ||||
| ESRb (mm per hour) | 16 (8–30) | 14 (7–26) | 33 (14–67) | <0.001 |
| ALPb (IU l−1) | 72 (60–87) | 71 (59–85) | 81 (68–104) | <0.001 |
| Hb (g dl−1) | 14.1 (12.7–15.3) | 14.3 (12.9–15.4) | 12.7 (11.4–14.2) | <0.001 |
| Hct (%) | 41.8 (38.3–45) | 42.3 (38.9–45.3) | 38.5 (34.8–42.2) | <0.001 |
Abbreviations: BMI=body mass index; TNM=tumour node metastasis; G=grade; ESR=erythrocyte sedimentation rate; ALP=alkaline phosphatase; Hb=haemoglobin; Hct=haematocrit; ASA=The American Society of Anestesiologists Physical Status.
a
All values are median (interquartile range) or proportion.
b
The presence of missing data on the variable.