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Table 1 Clinical demographics of chronic pancreatitis patients (n = 346) and controls (n = 346) in a retrospective case-control study

From: Cigarette smoking associated with chronic pancreatitis: a case control study in China

Variable

Chronic Pancreatitis

Control

 

P value

number

percent

number

percent

 

All subjects

346

 

346

  

Age (mean ± SD, years)

48.97 ± 14.11

49.16 ± 14.40

 

< 30 (years)

28

8.10%

29

8.40%

0.89

≥ 30 (years)

318

91.90%

317

91.00%

Gender

 Male

267

77.17%

270

78.03%

0.784

 Female

79

22.83%

76

21.97%

Body mass index (kg/m2)

22.46 ± 13.52

24. 59 ± 3.29

 

10–18.5

26

8%

46

13.29%

0.018

≥ 18.5

110

32%

83

23.99%

Smoking duration (years)

  < 20

236

68.21%

245

70.81%

0.001

 20–30

58

16.76%

78

22.54%

  > 30

52

15.03%

23

6.65%

Smoking index (pack x year)

  < 400

260

75%

291

84.10%

0.001

 400–800

72

21%

42

12.14%

  ≥ 800

14

4%

13

3.76%

Drinking status

 no

204

58.96%

161

46.53%

0.001

 yes

142

41.04%

185

53.47%

Drinking duration (Drinking years)

  < 20

1

0.29%

50

14.45%

0.001

 20–35

2

0.58%

23

6.65%

  ≥ 35

129

37.28%

94

27.17%

Alcohol intake (g/month)

 1–18

37

10.69%

6

1.73%

0.001

 18–90

53

15.32%

13

3.76%

 91–180

42

12.14%

148

42.77%

Alcohol consumption (Alcohol intakex Drinking duration)

 0

240

69.36%

185

53.47%

0.001

 1

80

23.12%

158

45.66%

 3

26

7.51%

3

0.87%

Biliary disease

 No

210

60.70%

344

99.4%

 

 Yes

136

39.30%

2

0.6%

 
  1. Alcohol intake (grams per month) was expressed as grams of alcohol consumption per month
  2. Drinking duration was calculated as years of drinking (drinking years)
  3. Alcohol consumption = Alcohol intake (grams per month) x Drinking duration (drinking years)