Clinical features and survival and mortality characteristics of patients
The clinical characteristics of the 87 patients are described in Table 1. The average age was 64.8 ± 9.6 (range, 41–109). 59 (67.8%) of the patients were male and 28 (32.2%) were female. The average survival time of the patients was 15.6 ± 10.6 months (range, 1–45) and the average disease-free survival time was 13.5 ± 15.5 (range, 0–72) months.
The average hemoglobin value of the patients was 12.8 ± 1.7 (range, 8.4–17.1), the average albumin value was 39.7 ± 5.3 (range, 26.4–51.0), the average lymphocyte value was 1914, 7 ± 846.1 (µL) (range, 400–4780), mean platelet value 274413.8 ± 87668.7 (µL) (range, 124000–614000) and mean CRP value 18.8 ± 24.1 (mg/L) (range, 0.3–99, 3) was found to be.
While the average HALP score of the patients was 38.8 ± 22.3 (range, 5.9-132.2), their average LCR score was observed to be 0.66 ± 1.34 (range, 0.01–9.57).
The average number of metastatic lymph nodes in all patients was determined to be 22.3 ± 11.6 (range, 0–58). Mortality occurred in 72 (82.8%) patients during follow up period. Of a total of 87 patients, 57 (65.5%) received adjuvant chemotherapy and 1 (1.1%) received radiotherapy.
When TNM classification of the tumors are examined; It was observed that 15 (17.2%) were in the T1 stage, 45 (51.7%) were in the T2 stage, 17 (19.5%) were in the T3 stage, and 10 (11.5%) were in the T4 stage. When the N stages of the patients are examined; It was observed that 20 (23.0%) were in the N0 stage, 31 (35.6%) were in the N1 stage, and 36 (41.4%) were in the N2 stage. In the pathology of patients; it was observed that 12 (13.8%) had poor differentiation, 69 (79.3%) had moderate differentiation, and 6 (7%) had good differentiation. There was perineural invasion in 69 (79.3%) of the patients, lymphovascular invasion in 40 (46.0%), and local soft tissue invasion in 70 (80.5%) patients. (Table 1)
Table 1
Clinicopathological characteristics of pancreatic adenocarcinoma patients, n (%)
Proporties | n:87 |
Age (year, mean ± std, min-max) | 64,8 ± 9,6 (41–109) |
Gender (male/female) | 59 (%67,8)/ 28 (%32,2) |
Survival (month, mean ± std, min-max) | 15,6 ± 10,6 (1–45) |
Disease-free Survival (month, mean ± std, min-max) | 13,5 ± 15,5 (0–72) |
Hemoglobin (mean ± std, min-max) | 12,8 ± 1,7 (8,4–17,1) |
Albumin (mean ± std, min-max) | 39,7 ± 5,3 (26,4–51,0) |
Lymphocyte (mean ± std, min-max) | 1914,7 ± 846,1 (400–4780) |
Platelet (mean ± std, min-max) | 274413,8 ± 87668,7 (124000–614000) |
CRP (mean ± std, min-max) | 18,8 ± 24,1 (0,3–99,3) |
HALP score | 38,8 ± 22,3 (5,9-132,2) |
LCR value | 0,66 ± 1,34 (0,01–9,57) |
Lymph node (mean ± std, min-max) | 22,3 ± 11,6 (0–58) |
Mortality (yes/no) | 72 (%82,8)/ 15 (%17,2) |
Tstage (1 stage /2stage/ 3 stage / 4stage) | 15 (%17,2) / 45(%51,7) /17 (%19,5)/ 10 (%11,5) |
N stage (0 stage /1stage/ 2 stage ) | 20 (%23,0)/ 31 (%35,6)/ 36 (%41,4) |
PRSM (yes/no) | 35 (%40,2)/ 52(%59,8) |
Differentiation (Poor/Little/Middle/Well) | 1(%1,1)/ 12 (%13,8)/ 69(%79,3)/ 5(%5,7) |
Perineural invasion (yes/no) | 69 (%79,3)/ 18 (%20,7) |
Lymphovascular invasion (yes/no) | 40 (%46,0)/ 47(%54,0) |
Local soft tissue invasion (yes/no) | 70 (%80,5)/ 17(%19,5) |
Adjuvant Chemotherapy (yes/no/ radiotherapy) | 57 (%65,5)/ 29 (%33,3)/ 1 (%1,1) |
Abbreviations: PRSM :positive retroperitoneal surgical margin, T: tumor, N:lymph node
Relationship between albumin, HALP score and LCR value and clinical features
The sensitivity, selectivity, positive-negative predictive values and likelihood ratio (+) values calculated regarding the classification success of HALP values in response prediction according to the cut-off values determined as a result of ROC analysis of pancreatic adenocarcinoma patients are presented in Table 2–3 and Fig. 1. For patients with pancreatic adenocarcinoma, the cut-off point for albumin value was 38.55, the cut-off point for HALP value was 34.4, and the cut-off point for LCR value was 0.61. Classification success for this cut-off point; In patients with pancreatic adenocarcinoma, the sensitivity for the HALP score was found 89.3% and the specificity was 55.6%, the sensitivity for the LCR question was 79.8% and the specificity was 64.3%, and the sensitivity for the albumin value was 88.6% and the specificity was 78.8%.
Table 2
Cut-off values and sensitivity results for albumin value, HALP score and LCR value of patients with pancreatic adenocarcinoma
| With pancreatic adenocarcinoma- HALP | With pancreatic adenocarcinoma- LCR | With pancreatic adenocarcinoma- Albumin |
AUC (95% CI) | 0.655 (0.518–0.791) | 0.771 (0.664–0.877) | 0,826 (0,657-0,994) |
P values | 0.034 | < 0.001 | 0,028 |
Cut off | 34,41 | 0,61 | 38,55 |
Sensitivity (95% CI) | 89.3% (63,5-98.5) | 79,8% (62.2–97.9) | 88,6% (69,7–99,3) |
Specificity (95% CI) | 55,6% (32.1–65.9) | 64,3% (51-78.2) | 78,8% (61,2–82,7) |
PPV (95% CI) | 26.8% (16.5–41.1) | 37.5% (22.5–53) | 34,2% (20,1–48,9) |
NPV (95% CI) | 94.9% (77.3–98.9) | 96.7% (85.2–99.2) | 95,4% (78,4–97,8) |
LR+ (95% CI) | 1.66 (1.18–2.14) | 2.51 (1.59–3.32) | 1,78% (1,21 − 2,85) |
ROC: Receiver Operating Characteristic, PPV: positive predictive value, NPV: negative predictive value,
AUC: Area under curve, CI: Confidence interval, HALP: Hemoglobin, albumin, lymphocyte, and platelet; LCR: lymphocytes and CRP. LR+: Likelihoods Ratio
Table 3
ROC analyses of albumin, HALP score and LCR score.
Test Result Variable(s) | Area | Std. Errora | Asymptotic Sig.b | Asymptotic 95% Confidence Interval |
Lower Bound | Upper Bound |
HALP SCORE | 0,590 | 0,070 | 0,017 | 0,452 | 0,727 |
LCR VALUE | 0,490 | 0,066 | 0,048 | 0,361 | 0,619 |
ALBUMIN VALUE | 0,582 | 0,792 | 0,032 | 0,428 | 0,736 |
a. Under the nonparametric assumption. b. Null hypothesis: true area = 0.5 |
The cut-off value of HALP score was set as 34.4, providing the optimal classification for survival prediction. Low levels of HALP scores were present in 42 patients. While the averages of age, disease-free survival, platelet and CRP levels of patients with low HALP scores were higher than the high HALP group, their survival times, hemoglobin, albumin, lymphocyte and average lymph node numbers were lower than the high HALP score group.HALP score averages, survival (p = 0.048), disease-free survival (p = 0.032), Hb (p < 0.01), albumin (p < 0.01), lymphocyte (p < 0.001), platelet (p = 0.006). It was observed that there were significant differences between CRP (p = 0.036) and resected lymph node (p = 0.027). In addition, high HALP score was significantly associated with the patients being male, T1-2 stages, N1-2 stages, and receiving adjuvant chemotherapy (p < 0.05).(Table 4)
Table 4
Relationship between HALP score and clinical features
Variables | HALP | p |
Low (≤ 34,4, n:42) | High (> 34,4, n:45) |
Age (year, mean ± std) | 65,7 ± 8,1 | 63,9 ± 10,9 | 0,379 |
Survival (month, mean ± std) | 15,8 ± 19,1 | 19,3 ± 11,1 | 0,048* |
Disease-free Survival (month, mean ± std,) | 13,4 ± 9,0 | 17,7 ± 11,8 | 0,032* |
Hemoglobin (mean ± std) | 12,3 ± 1,7 | 13,5 ± 1,3 | < 0,001* |
Albumin (mean ± std) | 37,2 ± 5,3 | 42,0 ± 4,2 | < 0,001* |
Lymphocyte (mean ± std,) | 1456,0 ± 592,6 | 2342,9 ± 826,8 | < 0,001* |
Platelet (mean ± std) | 300.714,3 ± 94.742,1 | 249.866 ± 73.359 | 0,006* |
CRP (mean ± std) | 24,4 ± 25,0 | 13,6 ± 22,3 | 0,036* |
Lymph node (mean ± std) | 19,1 ± 9,3 | 24,1 ± 13,2 | 0,027* |
Gender (male/female) | 26/16 | 33/12 | 0,018* |
Mortality (yes/no) | 36/6 | 36/9 | 0,338 |
T stage (1 stage /2 stage/ 3 stage / 4 stage) | 10/21/7/4 | 5/24/10/6 | 0,017* |
N stage(0 /1/ 2 ) | 12/17/13 | 8/14/23 | 0,046* |
PRSM (yes/no) | 15/27 | 20/25 | 0,271 |
Differentiation (Poor/Little/Middle/Well) | 0/5/33/4 | 1/7/36/1 | 0,367 |
Perineural invasion (yes/no) | 34/8 | 35/10 | 0,461 |
Lymphovascular invasion (yes/no) | 21/21 | 19/260,304 | 0,204 |
Local soft tissue invasion (yes/no) | 33/9 | 37/8 | 0,436 |
Adjuvant Chemotherapy (yes/no/radiotherapy) (n:87) | 25/16/1 | 32/13/0 | 0,012* |
(One way ANOVA test, Chi square test, independent test, p < 0.05 significance)
The cut-off value of LCR was set at 0.61, which provided the best classification for survival prediction. Low-level LCR was present in 70 patients. While the survival times, platelet, CRP levels and average number lymph nodes of patients with low LCR levels were higher than the high LCR group, their average age, disease-free survival time, hemoglobin, albumin and lymphocyte average numbers were observed to be lower than the high LCR group. It was observed that there were significant differences between the average valus of LCR and survival (p = 0.041), disease-free survival (p = 0.042), lymphocyte (p = 0.004), platelet (p = 0.008) and CRP levels (p < 0.001). In addition, the LCR score was significantly associated with patients being male, developing mortality, being in the T2-3 stages, being in the N1-2 stages, and receiving adjuvant chemotherapy (p < 0.05).
Low LCR level was significantly associated with levels of perineural invasion, lymphovascular invasion, and surrounding soft tissue invasion ( P < 0.05).(Table 5)
Table 5
Relationship between LCR value and clinical features
Variables | LCR | p |
Low (≤ 0,61, n:70) | High (> 0,61, n:17) |
Age (year, mean ± std) | 64,0 ± 7,9 | 68,9 ± 14,7 | 0,141 |
Survival (month, mean ± std) | 17,8 ± 11,0 | 18,5 ± 8,6 | 0,041* |
Disease-free Survival (month, mean ± std,) | 12,8 ± 12,8 | 16,3 ± 14,5 | 0,042* |
Hemoglobin (mean ± std) | 12,7 ± 1,7 | 13,0 ± 1,4 | 0,437 |
Albumin (mean ± std) | 37,3 ± 5,4 | 41,2 ± 4,7 | 0,181 |
Lymphocyte (mean ± std,) | 1788,6 ± 770,4 | 2434,1 ± 965,5 | 0,004* |
Platelet (mean ± std) | 286.571,4 ± 88.428,7 | 224.352,9 ± 65418,8 | 0,008* |
CRP (mean ± std) | 23,0 ± 25,2 | 11,5 ± 0,8 | < 0,001* |
Lymph node (mean ± std) | 22,4 ± 11,2 | 21,6 ± 13,4 | 0,654 |
Gender (male/female) | 46/24 | 13/4 | 0,023* |
Mortality (yes/no) | 58/12 | 14/3 | 0,012* |
T stage (1 /2/ 3 / 4) | 14/37/13/6 | 1/8/4/4 | 0,029* |
N stage (0 /1 / 2 ) | 15/22/33 | 5/9/3 | 0,031* |
PRSM (yes/no) | 29/41 | 6/11 | 0,430 |
Dıfferentıatıon (Poor/Little/Middle/Well) | 1/8/57/4 | 0/4/12/1 | 0,267 |
Perineural invasion (yes/no) | 56/14 | 13/4 | 0,048* |
Lymphovascular invasion (yes/no) | 33/37 | 7/10 | 0,038* |
Local soft tissue invasion (yes/no) | 59/11 | 11/6 | 0,041* |
Adjuvant Chemotherapy (yes/no/radiotherapy) (n:87) | 50/19/1 | 7/10/0 | 0,034* |
(One way ANOVA test, Chi square test, independent test, p < 0.05 significance)
The cut-off value for albumin was set at 38.55, providing the best classification for survival prediction. 35 patients had low levels of albumin. While the average age, platelet and CRP values of patients with low albumin values were higher than those of patients with high albumin values, it was observed that disease-free survival time, survival times, hemoglobin, lymphocyte and lymph node average numbers were lower than those of patients with high albumin values. It was determined that there were significant differences between the albumin value averages and survival (p = 0.043), disease-free survival (p = 0.017), Hb (p < 0.01), and lymphocyte count (p = 0.013). Moreover, low albumin value level was significantly associated with peri neural, peri vascular and local soft tissue invasion levels (P < 0.05). (Table 6)
Table 6
Relationship between albumin value and clinical features
Variables | ALBUMIN | p |
Low (≤ 38,55, n:35) | High (> 38,55, n:52) |
Age (year, mean ± std) | 65,2 ± 7,3 | 64,5 ± 11,0 | 0,748 |
Survival (month, mean ± std) | 14,6 ± 9,1 | 16,3 ± 11,8 | 0,043* |
Disease-free Survival (month, mean ± std,) | 10,0 ± 11,6 | 15,7 ± 17,3 | 0,017* |
Hemoglobin (mean ± std) | 11,8 ± 1,7 | 13,4 ± 1,3 | 0,001* |
Lymphocyte (mean ± std,) | 1739,1 ± 722,2 | 2032,9 ± 907,8 | 0,013* |
Platelet (mean ± std) | 277400,0 ± 71123,4 | 272403,8 ± 97866,1 | 0,796 |
CRP (mean ± std) | 20,2 ± 21,3 | 17,9 ± 26,0 | 0,671 |
Lymph node (mean ± std) | 21,1 ± 10,0 | 23,1 ± 12,6 | 0,446 |
Gender (male/female) | 12/23 | 16/36 | 0,454 |
Mortality (yes/no) | 4/31 | 11/41 | 0,188 |
T stage (1 stage /2stage/ 3 stage / 4stage) | 5/20/8/2 | 10/25/9/8 | 0,319 |
N stage (0 stage /1stage/ 2 stage ) | 7/13/15 | 13/18/21 | 0,862 |
RPTM (yes/no) | 22/13 | 30/22 | 0,399 |
Dıfferentıatıon (Poor/Little/Middle/Well) | 4/29/1/1 | 8/40/4/0 | 0,388 |
Perineural invasion (yes/no) | 5/30 | 13/39 | 0,017* |
Lymphovascular invasion (yes/no) | 18/17 | 29/23 | 0,042* |
Surrounding soft tissue invasion (yes/no) | 5/30 | 12/40 | 0,023* |
Adjuvant Chemotherapy (yes/no/radiotherapy) (n:87) | 16/19/0 | 41/10/1 | 0,038* |
According to the results of Kaplan Meier analysis; it was found that the overall survival time of patients with low HALP scores was significantly longer (15.8 months) than patients with high HALP scores (19.3 months) (p < 0.01). In addition, it was found that the overall survival time of patients with low LCR score was significantly longer (17.8 months) and that of patients with high LCR score was significantly longer (18.5 months) (p < 0.01). In addition, it was determined that the overall survival time of patients with low albumin value was significantly longer (14.6 months) and that of patients with high albumin value was significantly longer (16.3 months) (p < 0.01).
According to the results of Kaplan Meier analysis; it was found that the disease-free survival time (13.4 months) of patients with low HALP scores was significantly shorter (17.7 months) than patients with high HALP scores (p < 0.01). In addition, it was observed that the disease-free survival time of the patients (12.8 months) was significantly shorter (16.3 months) than that of patients with high LCR scores (p < 0.01). In addition, it was determined that the disease-free survival time (11.8 months) of patients with low albumin values was significantly longer (15.7 months) than patients with high albumin values (p < 0.01).
It was observed that low HALP level, low albumin value and high LCR level were independent risk factors for early recurrence and short survival, regardless of gender, tumor stage and other variables.
In univariate analysis, age, differentiation, tumor size, T stage, N stage, Metastatic LN and Lymphovascular invasion predicted survival (p < 0.05).
Univariate Cox regression analysis showed that albumin, LCR and HALP levels were all associated with median overall survival time (Table 6). According to the result of multivariate Cox regression analysis, HALP score showed that it was an independent favorable factor for overall survival [HR = 2.367, 95% confidence interval (CI): 1.174–2.357, P < 0.001]. Additionally, LCR values was observed to be an independent positive factor for overall survival [HR = 1.188, 95% confidence interval (CI): 1.023–1617, = 0.012]. Moreover, it showed that albumin value was an independent favorable factor for overall survival [HR = 2.796, 95% confidence interval (CI): 1.878–4.286, P < 0.025]. (Table 7)
Table 7
Univariate and multivariate Cox analysis for overall survival
| Univariate analysis | Multivariate analysis | |
Variable | HR(95%CI) | P value | HR(95%CI) | P value | |
Univariateanalysis | | | | |
Age | 1.361 (1,036 − 1,681) | 0.012 | - | - |
Sex.female vs male | 0.789 (0.562–1.265) | 0,478 | - | - |
Adjuvant Chemotherapy | 1.221 (0.912–1.668) | 0.23 | 1,067 (0.912–2,388) | 0.231 |
Mortality | 3.635 (2.321–5.684) | 0.033 | 2,840 (0,915-4,671) | < 0.001 |
Lymph node | 1.856 (1.047–2.190) | 0,047 | 1.719 (1.427–1.915) | < 0.001 |
CRP | 1.775 (1.365–2.215) | 0,043 | 1.687(1.380–2.165) | < 0.001 |
Antrum | 1.473 (1.175–1.876) | 0.423 | 1.264 (1.135–1.387) | 0,009 |
Diferantiation | 1.856 (1.241–2.732) | 0.003 | 1.319 (0.982–1.862) | 0,024 |
T Stage | 2.894 (1.787–5.265) | 0.014 | 2.478 (1.258–4.775) | 0,037 |
N Stage HALP score ((≤ 34,4/>34,4) LCR score (≤ 0,61/>0,61) | 1.935 (1.125–2.092) 2,635 (1.712–3.029) 1.226 (1.068–1.681) | 0.014 < 0.001 0,006 | 1.512 (1.157–1.913) 2,367 (1,174-2.357) 1.188 (1,023-1617) | 0,022 < 0.001 0,012 |
Albumin (≤ 38,55/ >38,55) | 2,147 (1.536–2.489) | 0,013 | 2,796 (1,878–4,286) | 0,025 |
Positive retroperiton surgical margin | 3.852 (1.836–7.910) | < 0.001 | 3,589(1,940–6,539) | < 0.001 |
Local soft tissue invasion | 2.284 (1.24–4.18) | 0.008 | 3.412 (2.111–4.216) | < 0.001 |
Lymphovascular invasion | 2.367 (1.487–3.711) | < .001 | 2.158 (1.517–2.943) | 0,415 |
Perineural invasion | 1.892 (0.987–2.822) | 0.521 | 1.632(1.365–2.573) | 0,352 |