Case Control Study
Copyright ©The Author(s) 2019.
World J Gastrointest Oncol. Dec 15, 2019; 11(12): 1126-1140
Published online Dec 15, 2019. doi: 10.4251/wjgo.v11.i12.1126
Table 1 Patient characteristics in the adenocarcinoma and control groups, n (%)
CharacteristicsPDAC (n = 114)Control (n = 125)
Age (yr), mean (SD)64.76 (10.58)b60.26 (12.03)
Age > 50 yr103 (90.35)b89 (71.2)
Sex (female)47 (41.23)46 (36.8)
BMI (kg/m2), median (IQR)25.09 (22.05-27.25)25.26 (22.58-28.72)
Weight status
Underweight12 (10.53)5 (4)
Normal48 (42.11)53 (42.4)
Overweight37 (32.46)44 (35.2)
Obesity17 (14.91)23 (18.4)
Smoking50 (43.86)69 (55.2)
New-onset diabetes24 (21.05)b8 (6.4)
Long-term diabetes24 (21.05)32 (25.6)
Diabetes49 (42.98)a38 (30.4)
CA 19-9 (U/mL), median (IQR)400 (67.75-400)b31.45 (9.58-98.8)
Cachexia22 (19)8 (6)
T stage1-2: 10 (8.85); 3: 65 (57.52); 4: 38 (33.63)
Histological gradeG1: 8/41 (19.51); G2: 24/41 (58.54); G3: 12/41 (29.27)
N stage9 (8.18)
Metastasis48 (42.11)
Table 2 Protein plasma expression in adenocarcinoma patients and interaction with clinical and biological parameters, n (%)
Protein expressionMidkine
Activin
Low (n = 60)High (n = 54)Low (n = 42)High (n = 72)
Age (yr), mean (SD)63.02 (10.06)66.7 (10.91)63.64 (10.4)65.42 (10.7)
BMI (kg/m2), median (IQR)24.34 (20.71-26.54)25.79 (23.11-27.52)a25.66 (22.24-27.52)24.52 (22.05-26.94)
CA 19-9 (U/mL), median (IQR)400 (53.5-400)352 (70-400)400 (53.5-400)191 (70-400)
Age > 50 yr53 (88.33)50 (92.59)36 (85.71)67 (93.06)
Sex (female)27 (45)20 (37.04)18 (42.86)29 (40.28)
Stage (III-IV vs I-II)28 (46.67)39 (72.22)b20 (47.62)47 (65.28)
Histological grade
G13 (16.67)4 (17.39)3 (16.67)4 (17.39)
G210 (55.56)12 (52.17)13 (72.22)9 (39.13)
G35 (27.78)7 (30.43)2 (11.11)10 (43.48)
Metastasis20 (33.33)28 (51.85)a14 (33.33)34 (47.22)
Tumor size ≥ 3 cm44 (78.57)43 (87.76)30 (75)57 (87.69)
Weight loss of 5% over the past 6 mo45 (90)29 (82.86)11 (26)23 (32)
Weight
Underweight9 (15)3 (5.56)3 (7.14)9 (12.5)
Normal28 (46.67)20 (37.04)16 (38.1)32 (44.44)
Overweight15 (25)22 (40.74)14 (33.33)23 (31.94)
Obesity8 (13.33)9 (16.67)8 (11.11)
Smoking32 (53.33)18 (33.33)a17 (40.48)33 (45.83)
New-onset diabetes16 (26.67)8 (14.81)8 (19.05)16 (22.22)
Long-term diabetes6 (10)18 (33.33)b10 (23.81)14 (19.44)
Diabetes22 (36.67)27 (50)18 (42.86)31 (43.06)
IHC
Negative36 (60)22 (40.74)a29 (69.05)26 (36.11)b
Weak18 (30)16 (29.63)11 (26.19)42 (58.33)
Moderate5 (8.33)11 (20.37)2 (4.76)4 (5.56)
Strong1 (1.67)5 (9.26)
Immunohistochemistry perineural invasion (appearances on slide)2: 3 (9.09); 0: 17 (51.52); 1: 13 (39.39)2: 9 (32.14)a; 0: 7 (25); 1: 12 (42.86)2: 5 (17.86); 0: 13 (46.43); 1: 10 (35.71)2: 7 (21.21); 0: 11 (33.33); 1: 15 (45.45)
Cachexia16 (73)6 (27)15 (26)7 (32)
Table 3 Univariate and multivariate analysis to predict metastasis
Univariate analyses
Multivariate analyses
OR unadjusted95%CIP valueOR unadjusted95%CIP value
Age > 50 yr0.950.23-4.160.9421.240.33-5.20.75
Sex (male vs female)1.250.53-2.990.6171.270.56-2.910.571
N12.040.53-10.090.3262.270.61-10.920.251
Tumor size ≥ 3 cm0.870.28-2.80.8091.130.4-3.390.821
Midkine expression (high-expressed vs low-expressed)2.120.92-50.081.920.87-4.330.11
Activin expression (high-expressed vs low-expressed)1.940.78-5.010.1571.620.71-3.810.261
Table 4 Univariate and multivariate analysis to predict survival
Univariate analyses
Multivariate analyses
HR adjusted95%CIP valueHR adjusted95%CIP value
Age > 50 yrs2.431.18-5.010.0161.90.86-4.20.113
Sex (male vs female)0.510.34-0.760.0010.660.42-1.050.078
N11.420.74-2.730.2991.130.54-2.360.745
Tumor size ≥ 3 cm2.131.13-4.010.022.361.21-4.620.012
Metastases2.091.4-3.12< 0.0011.621.01-2.620.047
Midkine expression (high-expressed vs low-expressed)1.671.12-2.480.0110.760.48-1.20.24
Activin expression (high-expressed vs low-expressed)3.612.34-5.56< 0.0011.981.2-3.270.008