Table 3

Validity of self-reported medication, among subgroups, for predicting actual prescriptions during 3 months

SexAgeIncome*
MenWomen40−64 years65–74 years<Median≥Median
Hypertension
 True-positive, N59526700247210 18064916161
 True-negative, N13 18022 24513 37522 05017 46717 958
 False-positive, N265229421082451228572737
 False-negative, N458583240801541500
 Sensitivity (95% CI), %92.9 (92.2 to 93.5)92.0 (91.3 to 92.6)91.2 (90.0 to 92.2)92.7 (92.2 to 93.2)92.3 (91.7 to 92.9)92.5 (91.8 to 93.1)
 Specificity (95%CI), %83.2 (82.7 to 83.8)88.3 (87.9 to 88.7)92.5 (92.1 to 92.9)83.0 (82.6 to 83.5)85.9 (85.5 to 86.4)86.8 (86.3 to 87.2)
 κ Statistic (95%CI), %69.1 (67.8 to 70.4)72.0 (71.0 to 73.1)74.3 (72.8 to 75.8)68.9 (67.9 to 69.9)70.6 (69.5 to 71.8)71.2 (70.0 to 72.3)
Diabetes
 True-positive, N1324937462179911411120
 True-negative, N20 16831 02816 46534 73125 55325 643
 False-positive, N458321153626406373
 False-negative, N29218489387256220
 Sensitivity (95% CI), %81.9 (80.0 to 83.8)83.6 (81.3 to 85.7)83.8 (80.5 to 86.8)82.3 (80.6 to 83.9)81.7 (79.5 to 83.7)83.6 (81.5 to 85.5)
 Specificity (95%CI), %97.8 (97.6 to 98.0)99.0 (98.9 to 99.1)99.1 (98.9 to 99.2)98.2 (98.1 to 98.4)98.4 (98.3 to 98.6)98.6 (98.4 to 98.7)
 κ Statistic (95%CI), %76.1 (74.8 to 77.4)78.0 (76.9 to 79.1)78.5 (77.0 to 80.0)76.6 (75.6 to 77.6)76.2 (75.1 to 77.4)77.9 (76.7 to 79.1)
Dyslipidaemia
 True-positive, N264458141651680743914067
 True-negative, N17 73623 12814 40726 45720 16120 703
 False-positive, N12902741781325020831948
 False-negative, N5727873301029721638
 Sensitivity (95% CI), %82.2 (80.8 to 83.5)88.1 (87.3 to 88.8)83.3 (81.6 to 85.0)86.9 (86.1 to 87.6)85.9 (84.9 to 86.8)86.4 (85.4 to 87.4)
 Specificity (95%CI), %93.2 (92.9 to 93.6)89.4 (89.0 to 89.8)94.9 (94.5 to 95.2)89.1 (88.7 to 89.4)90.6 (90.2 to 91.0)91.4 (91.0 to 91.8)
 κ Statistic (95%CI), %69.0 (67.7 to 70.3)69.8 (68.7 to 70.9)71.2 (69.7 to 72.6)68.8 (67.8 to 69.8)69.4 (68.2 to 70.6)70.1 (68.9 to 71.3)
  • *Median equivalent income was 1 170 000 yen (as of 30 June 2015, US$1 was equivalent to 122.72 yen).