Education specific age adjusted prevalence rates* of self reported acute illness and their odds† ratios and relative indices of inequalities (RII)‡ among Korean men and women aged 20–59: 1989, 1992, 1995, 1999 Social Statistics Survey of Korea’s National Statistical Office
| Elementary or less | Middle | High | College or higher | Total | |
|---|---|---|---|---|---|
| *Age adjusted prevalence rates were calculated with age adjustment to five year age groups according to the direct method with distribution of 1999 data; †odds ratios were computed using logistic regression. “College or higher” groups was the referent (1.0); ‡relative indices of inequalities were computed using logistic regression analyses. | |||||
| Men aged 30–59 | |||||
| 1989 | |||||
| Number of the surveyed | 5200 | 4357 | 7415 | 3331 | 20303 |
| Self reported acute illness (n) | 814 | 649 | 1055 | 391 | 2909 |
| Age adjusted prevalence rates (95% CI) | 14.7 (13.7 to 15.7) | 15.1 (14.0 to 16.1) | 14.9 (14.0 to 15.7) | 11.9 (10.8 to 13.0) | 14.4 (13.9 to 14.9) |
| Odds ratio (95% CI) | 1.27 (1.12 to 1.46) | 1.29 (1.13 to 1.48) | 1.25 (1.11 to 1.42) | 1.00 | |
| RII (95% CI) | 1.25 (1.08 to 1.45) | ||||
| 1992 | |||||
| Number of the surveyed | 4590 | 4424 | 8502 | 4188 | 21704 |
| Self reported acute illness (n) | 805 | 738 | 1259 | 588 | 3390 |
| Age adjusted prevalence rates (95% CI) | 15.7 (14.7 to 16.8) | 16.6 (15.5 to 17.7) | 15.3 (14.5 to 16.0) | 14.6 (13.5 to 15.7) | 15.7 (15.2 to 16.2) |
| Odds ratio (95% CI) | 1.12 (1.00 to 1.27) | 1.15 (1.02 to 1.30) | 1.05 (0.94 to 1.16) | 1.00 | |
| RII (95% CI) | 1.17 (1.02 to 1.34) | ||||
| 1995 | |||||
| Number of the surveyed | 3488 | 3940 | 9275 | 4926 | 21629 |
| Self reported acute illness (n) | 650 | 626 | 1284 | 666 | 3226 |
| Age adjusted prevalence rates (95% CI) | 17.3 (16.1 to 18.6) | 15.5 (14.4 to 16.6) | 13.8 (13.1 to 14.5) | 13.4 (12.5 to 14.4) | 14.9 (14.4 to 15.4) |
| Odds ratio (95% CI) | 1.39 (1.23 to 1.58) | 1.19 (1.05 to1.34) | 1.02 (0.92 to 1.13) | 1.00 | |
| RII (95% CI) | 1.46 (1.27 to 1.67) | ||||
| 1999 | |||||
| Number of the surveyed | 2268 | 2884 | 8406 | 4818 | 18376 |
| Self reported acute illness (n) | 526 | 551 | 1354 | 673 | 3104 |
| Age adjusted prevalence rates (95% CI) | 20.0 (19.3 to 21.6) | 18.5 (17.1 to 20.0) | 16.5 (15.7 to 17.3) | 14.1 (13.1 to 15.1) | 16.9 (16.3 to 17.4) |
| Odds ratio (95% CI) | 1.61 (1.41 to 1.85) | 1.33 (1.17 to 1.51) | 1.16 (1.05 to 1.28) | 1.00 | |
| RII (95% CI) | 1.65 (1.42 to 1.90) | ||||
| RII trend (p value) | 0.0012 | ||||
| Women aged 30–59 | |||||
| 1989 | |||||
| Number of the surveyed | 10441 | 4982 | 4602 | 1063 | 21088 |
| Self reported acute illness (n) | 2148 | 1038 | 894 | 223 | 4303 |
| Age adjusted prevalence rates (95% CI) | 19.4 (18.6 to 20.1) | 22.0 (20.9 to 23.2) | 21.1 (19.9 to 22.3) | 23.1 (20.6 to 25.6) | 20.4 (19.8 to 20.9) |
| Odds ratio (95% CI) | 0.81 (0.69 to 0.95) | 0.96 (0.82 to 1.13) | 0.91 (0.77 to 1.07) | 1.00 | |
| RII (95% CI) | 0.79 (0.69 to 0.91) | ||||
| 1992 | |||||
| Number of the surveyed | 9387 | 5584 | 5938 | 1519 | 22428 |
| Self reported acute illness (n) | 2213 | 1318 | 1303 | 357 | 5191 |
| Age adjusted prevalence rates (95% CI) | 22.4 (21.6 to 23.3) | 24.6 (23.5 to 25.7) | 23.3 (22.3 to 24.4) | 26.5 (24.3 to 28.7) | 23.2 (22.7 to 23.8) |
| Odds ratio (95% CI) | 0.85 (0.74 to 0.97) | 0.96 (0.84 to 1.09) | 0.91 (0.80 to 1.04) | 1.00 | |
| RII (95% CI) | 0.79 (0.69 to 0.91) | 0.86 (0.76 to 0.97) | |||
| 1995 | |||||
| Number of the surveyed | 7219 | 5419 | 7373 | 2048 | 22059 |
| Self reported acute illness (n) | 1779 | 1131 | 1542 | 431 | 4883 |
| Age adjusted prevalence rates (95% CI) | 23.0 (22.1 to 24.0) | 21.3 (20.2 to 22.4) | 21.5 (20.6 to 22.4) | 20.8 (19.1 to 22.6) | 22.1 (21.6 to 22.7) |
| Odds ratio (95% CI) | 1.10 (0.96 to 1.25) | 0.96 (0.84 to 1.09) | 0.99 (0.88 to 1.12) | 1.00 | |
| RII (95% CI) | 1.10 (0.97 to 1.24) | ||||
| 1999 | |||||
| Number of the surveyed | 4767 | 4144 | 7610 | 2307 | 18828 |
| Self reported acute illness (n) | 1531 | 1078 | 1651 | 470 | 4730 |
| Age adjusted prevalence rates (95% CI) | 27.9 (26.6 to 29.2) | 25.5 (24.2 to 26.8) | 23.7 (22.7 to 24.6) | 21.8 (20.1 to 23.5) | 25.1 (24.5 to 25.7) |
| Odds ratio (95% CI) | 1.35 (1.19 to 1.55) | 1.19 (1.05 to 1.36) | 1.05 (0.94 to 1.18) | 1.00 | |
| RII (95% CI) | 1.42 (1.25 to 1.61) | ||||
| RII trend (p value) | <0.0001 | ||||