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Table 4 Cox proportional hazard regression models for time to recurrence (TTR), cancer-specific survival (CSS), and overall survival (OS) according to blood platelet count and clinicopathological characteristics

From: Platelet count, aspirin use, and characteristics of host inflammatory responses in colorectal cancer

 

TTRa

CSSb

OSc

HR

95% CI

p value

HR

95% CI

p value

HR

95% CI

p value

Patient age (< 65 vs. ≥ 65)

1.25

0.72–2.17

0.428

1.90

1.12–3.24

0.018

1.93

1.24–3.00

0.003

Patient gender (male vs. female)

0.93

0.56–1.55

0.794

1.45

0.90–2.32

0.124

1.10

0.76–1.61

0.605

Tumor invasion (T1–T2 vs. T3–T4)

1.86

0.91–3.80

0.091

1.25

0.65–2.39

0.504

1.20

0.74–1.96

0.456

Nodal metastases (N0 vs. N1–N2)

4.89

2.50–9.57

< 0.001

2.66

1.40–5.05

0.003

2.10

1.29–3.39

0.003

Distant metastases (M0 vs. M1)

6.43

3.63–11.4

< 0.001

4.61

2.80–7.62

< 0.001

Tumor location (colon vs. rectum)

1.13

0.61–2.09

0.697

0.86

0.51–1.46

0.577

0.83

0.53–1.31

0.430

Preoperative radiotherapy or chemoradiotherapy (no vs. yes)

1.25

0.61–2.53

0.541

1.43

0.69–2.94

0.334

1.36

0.75–2.46

0.319

Lymphatic invasion (no vs. yes)

1.20

0.64–2.24

0.572

1.89

1.01–3.54

0.046

1.33

0.83–2.14

0.236

mGPS (0 vs. 1–2)

0.69

0.29–1.65

0.402

1.72

1.00–2.96

0.049

1.67

1.07–2.61

0.023

Normocytic anemia (no vs. yes)

0.89

0.47–1.67

0.709

1.34

0.82–2.20

0.246

1.49

1.00–2.22

0.052

Blood platelet count (< 400 × 109/L vs. ≥ 400 × 109/L)

0.77

0.30–1.99

0.594

0.76

0.39–1.48

0.418

0.68

0.38–1.22

0.197

Aspirin (no vs. yes)

1.22

0.68–2.19

0.499

0.94

0.52–1.68

0.833

1.13

0.73–1.75

0.590

  1. The models aimed to enlighten the prognostic value of blood platelet count in CRC, relative to patient age and gender, TNM variables, lymphatic invasion, systemic inflammation (mGPS), normocytic anemia, aspirin use
  2. CI: confidence interval; CSS: cancer specific survival; HR: hazard ratio; mGPS: modified Glasgow Prognostic Score; OS: overall survival; TTR: time to recurrence
  3. an = 306; median follow-up time 60.4 months (IQR 25.0–79.8); 64 (20.9%) events; 50 (14.0%) cases excluded from the analysis because the operation was not radical or no follow-up data available
  4. bn = 356; median follow-up time 64.5 months (IQR 37.3–85.6); 77 (21.6%) events
  5. cn = 356; median follow-up time 64.5 months (IQR 37.3–85.6); 114 (32.0%) events