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Table 2 Distribution of social, health and clinical patient’s variables by age groups in stage II, III rectal cancer (n = 503)a

From: Impact of age on the use of adjuvant treatments in patients undergoing surgery for colorectal cancer: patients with stage III colon or stage II/III rectal cancer

 N<  65 years
N = 203
n (%)
65–80 years
N = 235
n (%)
>  80 years
N = 64
n (%)
P valueb
Sociodemographic variables
Sex502    
 Male 128 (63.1)169 (71.9)41 (64.1)0.12
 Female 75 (36.9)66 (28.1)23 (35.9)0.35
Deprivation index476    
 Quartile 1 least deprived 28 (14.7)41 (18.6)12 (18.8)0.66
 Quartile 2 68 (35.6)72 (32.6)16 (25.0)0.80
 Quartile 3 57 (29.8)71 (32.1)24 (37.5) 
 Quartile 4 most deprived 38 (19.9)37 (16.7)12 (18.8) 
Level of education408    
 Illiterate or with no formal education 9 (5.3)30 (15.9)11 (22.4)< 0.0005
 Primary 100 (58.8)137 (72.5)33 (67.3)< 0.0005
 Secondary 34 (20.0)8 (4.2)1 (2.0) 
 University 27 (15.9)14 (7.4)4 (8.2) 
Living arrangements403    
 Living alone 11 (6.7)30 (15.8)9 (18.8)0.01
 Living with others 154 (93.3)160 (84.2)39 (81.3)0.005
Family history of cancer464    
 No 97 (51.9)126 (58.3)42 (68.9)0.06
 Yes 90 (48.1)90 (41.7)19 (31.1)0.02
Screening478    
 No 167 (87.0)199 (88.8)58 (93.5)0.36
 Yes 25 (13.0)25 (11.2)4 (6.5)0.18
Health behaviours and comorbidities
Smoking habits498    
 Never smoker 82 (40.4)104 (44.8)37 (58.7)0.001
 Current smoker 49 (24.1)30 (12.9)3 (4.8)0.37
 Ex-smoker 72 (35.5)98 (42.2)23 (36.5) 
Alcohol483    
 No 175 (89.3)198 (87.2)56 (93.3)0.39
 Yes 21 (10.7)29 (12.8)4 (6.7)0.70
ASA class490    
 I-II 144 (73.1)118 (51.5)31 (48.4)< 0.0005
 III 51 (25.9)101 (44.1)31 (48.4)< 0.0005
 IV 2 (1.0)10 (4.4)2 (3.1) 
Charlson Index502    
 0 134 (66.0)118 (50.2)25 (39.1)< 0.0005
 1 43 (21.2)60 (25.5)18 (28.1)< 0.0005
  ≥ 2 26 (12.8)57 (24.3)21 (32.8) 
Tumour characteristics
Histological classification467    
 Adenocarcinoma 181 (96.8)201 (92.6)58 (92.1)0.05
 Mucinous adenocarcinoma 5 (2.7)16 (7.4)4 (6.3)0.05
 Signet-ring cell carcinoma 1 (0.5)0 (0.0)0 (0.0) 
 Other types of carcinoma 0 (0.0)0 (0.0)1 (1.6) 
Degree of differentiation389    
 Low grade 137 (86.7)153 (86.0)48 (90.6)0.68
 High grade 21 (13.3)25 (14.0)5 (9.4)0.62
Stage at diagnosis (pTNM or cTNM)502    
 II 61 (30.0)76 (32.3)27 (42.2)0.19
 III 142 (70.0)159 (67.7)37 (57.8)0.11
Intervention
Main intervention502    
 Elective 200 (98.5)234 (99.6)64 (100.0)0.35
 Emergency 3 (1.5)1 (0.4)0 (0.0)0.16
Curative resection476    
 R0 162 (84.4)193 (85.4)52 (89.7)0.60
 R1/R2 30 (15.6)33 (14.6)6 (10.3)0.37
Surgeon’s profile476    
 General 59 (30.3)71 (32.3)18 (29.5)0.87
 Coloproctologist 136 (69.7)149 (67.7)43 (70.5)0.92
Cancer committee418    
 No 52 (27.2)74 (33.2)19 (29.7)0.42
 Yes 139 (72.8)149 (66.8)45 (70.3)0.42
  1. aAge was missing in a case
  2. bPearson Chi-square test to generate upper P value and chi-square test for trends to generate lower P value