Table 3 Agreement rate (%), overstatement* rate (%), understatement* rate (%), and their 95% confidence intervals (CI)* for education level by gender, age, and cause of death: Reliability between Korea National Health and Nutrition Survey (NHANES) data and death certificate data
From: Consistency between education reported in health survey and recorded in death certificate
No. of subjects | Agreement rate (95% CI) | Overstatement rate (95% CI) | Understatement rate (95% CI) | |
|---|---|---|---|---|
Five educational groups (college or higher, high school, middle school, elementary school, no education) | ||||
All subjects | 511 | 70.7 (66.8–74.6) | 17.0 (13.7–20.3) | 12.3 (9.5–15.1) |
Gender | ||||
Men | 296 | 65.9 (60.5–71.3) | 19.3 (14.8–23.8) | 14.9 (10.8–19.0) |
Women | 215 | 77.2 (71.6–82.8) | 14.0 (9.4–18.6) | 8.8 (5.0–12.6) |
Age groups | ||||
20–64 | 199 | 65.8 (59.2–72.4) | 17.6 (12.3–22.9) | 16.6 (11.4–21.8) |
65+ | 312 | 73.7 (68.8–78.6) | 16.7 (12.6–20.8) | 9.6 (6.3–12.9) |
Duration between health survey and death | ||||
3.4 years or less | 255 | 69.4 (63.8–75.1) | 19.2 (14.4–24.1) | 11.4 (7.5–15.3) |
3.5–7.1 years | 256 | 71.9 (66.4–77.4) | 14.8 (10.5–19.2) | 13.3 (9.1–17.4) |
Cause of death | ||||
Cancer | 124 | 71.0 (63.0–79.0) | 17.7 (11.0–24.4) | 11.3 (5.7–16.9) |
Cardiovascular disease | 132 | 69.7 (61.9–77.5) | 18.2 (11.6–24.8) | 12.1 (6.5–17.7) |
External causes | 60 | 65.0 (52.9–77.1) | 15.0 (6.0–24.0) | 20.0 (9.9–30.1) |
Other causes | 195 | 72.8 (66.6–79.0) | 16.4 (11.2–21.6) | 10.8 (6.4–15.2) |
Three educational groups (college or higher, high and middle school, elementary school or less) | ||||
All subjects | 511 | 88.9 (86.2–91.6) | 5.9 (3.9–7.9) | 5.3 (3.4–7.2) |
Gender | ||||
Men | 296 | 86.2 (82.3–90.1) | 6.8 (3.9–9.7) | 7.1 (4.2–10.0) |
Women | 215 | 92.6 (89.1–96.1) | 4.7 (1.9–7.5) | 2.8 (0.6–5.0) |
Age groups | ||||
20–64 | 199 | 80.9 (75.4–86.4) | 8.5 (4.6–12.4) | 10.6 (6.3–14.9) |
65+ | 312 | 93.9 (91.2–96.6) | 4.2 (2.0–6.4) | 1.9 (0.4–3.4) |
Duration between health survey and death | ||||
3.4 years or less | 255 | 89.4 (85.6–93.2) | 6.3 (3.3–9.2) | 4.3 (1.8–6.8) |
3.5–7.1 years | 256 | 88.3 (84.3–92.2) | 5.5 (2.7–8.3) | 6.3 (3.3–9.2) |
Cause of death | ||||
Cancer | 124 | 84.7 (78.4–91.0) | 11.3 (5.7–16.9) | 4.0 (0.6–7.4) |
Cardiovascular disease | 132 | 87.1 (81.4–92.8) | 6.8 (2.5–11.1) | 6.1 (2.0–10.2) |
External causes | 60 | 86.7 (78.1–95.3) | 1.7 (0.0–5.0) | 11.7 (3.6–19.8) |
Other causes | 195 | 93.3 (89.8–96.8) | 3.1 (0.7–5.5) | 3.6 (1.0–6.2) |