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Table 1 Characteristics of study subjects

From: GWAS of habitual coffee consumption reveals a sex difference in the genetic effect of the 12q24 locus in the Japanese population

 

Discovery (East Japan)

Replication (West Japan)

P

N

6,264

5,975

–

Female, %

45.8

47.7

0.04

Age, years (mean ± SD)

49.9 ± 13.0

50.6 ± 13.3

0.005

BMI, kg/m2 (mean ± SD)

23.1 ± 3.8

23.0 ± 3.6

0.03

Coffee consumption, cups/day (mean ± SD)

2.01 ± 1.43

2.04 ± 1.41

0.30

Current alcohol drinkers, %

63.9

59.3

<  0.001

Current alcohol consumption, g/day (mean ± SD)a

12.2 ± 14.2

10.9 ± 12.6

< 0.001

  1. aAmong current alcohol drinkers, BMI Body mass index, SD Standard deviation
  2. P-values were calculated using Fisher’s exact test for sex and current alcohol drinkers, and Student’s t-test for all other variables