Skip to main content

Table 1 General characteristics of cases and controls stratified by sex, N (%)

From: The relationship between nut intake and risk of colorectal cancer: a case control study

 

Men (n = 1875)

 

Women (n = 894)

 

Variable

Cases (n = 625)

Controls (n = 1250)

P-valuea

Cases (n = 298)

Controls (n = 596)

P-valuea

Age (years)b

57.2 ± 9.4

56.6 ± 8.7

0.173

55.3 ± 10.2

54.9 ± 9.8

0.592

Marital status

  

<.001

  

<.001

 Married

557(89.1)

1162(93.0)

 

216(72.5)

493(83.7)

 

 Single

66(10.6)

72(5.8)

 

80(26.9)

98(16.5)

 

 Missing

2(0.3)

16(1.2)

 

2(0.5)

5(0.8)

 

Educational level

  

<.001

  

<.001

 Less than high school

183(29.2)

175(14.0)

 

138(46.3)

106(17.8)

 

 High school

266(42.6)

329(26.3)

 

103(34.6)

258(43.3)

 

 College or above

176(28.2)

712(57.0)

 

57(19.1)

223(37.4)

 

 Missing

0(0.0)

34(2.7)

 

0(0.0)

9(1.5)

 

Income (1000 won/month)

  

<.001

  

<.001

  < 2000

222(35.5)

254(20.3)

 

99(33.2)

134(22.5)

 

 2000–4000

253(40.5)

534(42.7)

 

134(45.0)

218(36.6)

 

  > 4000

150(24.0)

363(29.1)

 

65(21.8)

184(30.9)

 

 Missing

0(0.0)

99(7.9)

 

0(0.0)

60(10.0)

 

Body mass index (kg/m2)

  

<.001

  

0.270

  < 25

432(69.1)

734(58.7)

 

207(69.5)

435(73.0)

 

  ≥ 25

192(30.7)

516(41.3)

 

91(30.5)

161(27.0)

 

 Missing

1(0.2)

0(0.0)

 

0(0.0)

0(0.0)

 

Smoking status

  

0.076

  

<.001

 Non-smoker

145(23.2)

245(19.6)

 

264(88.6)

571(95.8)

 

 Ex-smoker

303(48.5)

671(53.7)

 

15(5.0)

16(2.7)

 

 Current smoker

177(28.3)

334(26.7)

 

19(6.4)

9(1.5)

 

 Missing

0(0.0)

0(0.0)

 

0(0.0)

0(0.0)

 

Alcohol consumption

  

0.001

  

0.187

 Non-drinker

107(17.1)

199(16.0)

 

172(57.7)

362(60.7)

 

 Ex-drinker

103(16.5)

136(10.9)

 

26(8.7)

33(5.5)

 

 Current drinker

415(66.4)

915(73.1)

 

100(33.6)

201(33.7)

 

 Missing

0(0.0)

0(0.0)

 

0(0.0)

0(0.0)

 

Regular exercise

  

<.001

  

<.001

 No

387(61.9)

490(39.2)

 

225(75.5)

262(44.0)

 

 Yes

238(38.1)

715(57.2)

 

73(24.5)

333(55.9)

 

 Missing

0(0.0)

45(3.6)

 

0(0.0)

1(0.1)

 

First-degree family history of cancer

  

0.002

  

0.141

 No

392(62.7)

686(54.9)

 

171(57.4)

311(52.2)

 

 Yes

233(37.3)

560(44.8)

 

127(42.6)

285(47.8)

 

 Missing

0(0.0)

4(0.3)

 

0(0.0)

0(0.0)

 

First-degree family history of colorectal cancer

  

<.001

  

0.926

 No

560(89.6)

1188(95.0)

 

277(93.0)

555(93.1)

 

 Yes

65(10.4)

58(4.6)

 

21(7.1)

41(6.9)

 

 Missing

0(0.0)

4(0.4)

 

0(0.0)

0(0.0)

 

Fruit and vegetable intake g/db

279.4 ± 155.7

350.2 ± 236.7

<.001

343.1 ± 192.8

470.7 ± 383.4

<.001

Red meat intake, g/db

56.0 ± 36.2

64.4 ± 41.9

<.001

40.9 ± 26.9

43.7 ± 28.7

<.001

Energy intake, kcal/db

2127.7 ± 509.1

1731.6 ± 545.8

<.001

1814.4 ± 523.5

1604.6 ± 577.4

<.001

  1. aP-values were calculated by using the chi-square test for categorical variables and linear regression for continues variables. b Mean (s.d.) c Fruit and vegetable intake and red meat intake were adjusted for total individual energy intake by using the residual method