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Table 1 Demographics of FAP and AFAP study participants

From: Variables affecting penetrance of gastric and duodenal phenotype in familial adenomatous polyposis patients

Characteristics

Total (n = 150)

FAP (n = 79)

AFAP (n = 71)

p-value1

Male (%)

42% (n = 62)

41% (n = 32)

42% (n = 30)

0.8282

Age in years

 Mean

41.4

39.6

43.4

0.0533

 Median

40

38.0

44

Range

18–68

18–67

18–68

Genetic diagnosis

93.3%

87.3%

100%

 

Colectomy

73.3% (n = 110)

98.7% (n = 78)

45.0% (n = 32)

< 0.0001

Average age at colectomy (range)

28.1 (8–60)

23.4 (8–46)

39.4 (22–60)

< 0.0001

NSAID usage in last 3 months

11.3% (n = 17)

13.9% (n = 11)

8.5% (n = 6)

0.2910

Current smokers

14.7% (n = 22)

15.2% (n = 12)

14.1% (n = 10)

0.8490

Number unique families

68.0% (n = 102)

75.9% (n = 60)

59.2% (n = 42)

 
  1. 1Categorical values compared with chi-square test (gender, genetic diagnosis, colectomy, NSAID use, current smokers). Continuous variables compared with Wilcoxon rank sum test (age, average age at colectomy)