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Table 4 Comparison of self-reported alcohol intake between PMRP and PhenX

From: Validation of PhenX measures in the personalized medicine research project for use in gene/environment studies

PhenX
  <1 1-2 3-4 5-7 Combined
PMRP N (%) N (%) N (%) N (%) N (%)
Number of days in the past 30 days that respondent drank one or more drinks
<1 1204 (54.8) 89 (4.0) 22 (1.0) 9 (0.4) 1324 (60.2)
1-2 224 (10.2) 141 (6.4) 41 (1.9) 16 (0.7) 422 (19.2)
3-4 63 (2.9) 66 (3.0) 52 (2.4) 35 (1.6) 216 (9.8)
5-7 42 (1.9) 28 (1.3) 33 (1.5) 133 (6.1) 236 (10.7)
Combined 1533 (69.7) 324 (14.7) 148 (6.7) 193 (8.8) 2198 (100.0)
Kappa = 0.666 (95% CL=0.627, 0.704)
  <1 1-2 3-4 5 or more Combined
PMRP N (%) N (%) N (%) N (%) N (%)
Usual number of drinks per day
<1 502 (24.9) 96 (4.8) 7 (0.3) 6 (0.3) 611 (30.4)
1-2 231 (11.5) 921 (45.8) 47 (2.3) 21 (1.0) 1220 (60.6)
3-4 15 (0.7) 67 (3.3) 51 (2.5) 11 (0.5) 144 (7.2)
5 or more 6 (0.3) 8 (0.4) 10 (0.5) 14 (0.7) 38 (1.9)
Combined 754 (37.4) 1092 (54.2) 115 (5.7) 52 (2.6) 2013 (100.0)
Kappa = 0.507 (95% CL=0.445, 0.5688)
  1. The numbers are the actual counts (and percent) of people reporting on the two questionnaires the number of days that they had an alcoholic drink in the previous 30 days how drinks they had on a typical days in the previous 30 days. Agreement is noted in bold.