Education specific age adjusted prevalence rates* of self rated health less than good 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 rated health less than good (n) | 2522 | 1954 | 2900 | 1170 | 8546 | |
| Age adjusted prevalence rates (95% CI) | 45.5 (44.1 to 46.8) | 45.1 (43.6 to 46.6) | 40.6 (39.5 to 41.7) | 35.9 (34.2 to 37.5) | 42.2 (41.5 to 42.9) | |
| Odds ratio (95% CI) | 1.51 (1.38 to 1.66) | 1.46 (1.33 to 1.61) | 1.20 (1.10 to 1.31) | 1.00 | ||
| RII (95% CI) | 1.67 (1.51 to 1.86) | |||||
| 1992 | ||||||
| Number of the surveyed | 4590 | 4424 | 8502 | 4188 | 21704 | |
| Self rated health less than good (n) | 2610 | 2304 | 3997 | 1659 | 10570 | |
| Age adjusted prevalence rates (95% CI) | 53.0 (51.5 to 54.4) | 51.8 (50.4 to 53.3) | 47.9 (46.9 to 49.0) | 40.4 (38.9 to 41.8) | 48.9 (48.2 to 49.5) | |
| Odds ratio (95% CI) | 1.73 (1.58 to 1.89) | 1.56 (1.43 to 1.70) | 1.33 (1.24 to 1.44) | 1.00 | ||
| RII (95% CI) | 1.86 (1.68 to 2.05) | |||||
| 1995 | ||||||
| Number of the surveyed | 3488 | 3940 | 9275 | 4926 | 21629 | |
| Self rated health less than good (n) | 2142 | 2219 | 4813 | 2257 | 11431 | |
| Age adjusted prevalence rates (95% CI) | 58.6 (57.0 to 60.3) | 55.2 (53.7 to 56.8) | 52.6 (51.6 to 53.6) | 46.3 (44.9 to 47.7) | 53.0 (52.3 to 53.7) | |
| Odds ratio (95% CI) | 1.63 (1.49 to 1.79) | 1.42 (1.31 to 1.55) | 1.25 (1.17 to 1.34) | 1.00 | ||
| RII (95% CI) | 1.71 (1.55 to 1.89) | |||||
| 1999 | ||||||
| Number of the surveyed | 2268 | 2884 | 8406 | 4818 | 18376 | |
| Self rated health less than good (n) | 1497 | 1765 | 4329 | 2135 | 9726 | |
| Age adjusted prevalence rates (95% CI) | 60.3 (58.3 to 62.3) | 59.0 (57.2 to 60.8) | 52.1 (51.0 to 53.2) | 44.5 (43.1 to 45.9) | 52.9 (52.2 to 53.6) | |
| Odds ratio (95% CI) | 2.09 (1.87 to 2.33) | 1.79 (1.63 to 1.98) | 1.30 (1.21 to 1.40) | 1.00 | ||
| RII (95% CI) | 2.26 (2.02 to 2.52) | |||||
| RII trend (p value) | 0.001 | |||||
| Women aged 30–59 | ||||||
| 1989 | ||||||
| Number of the surveyed | 10441 | 4982 | 4602 | 1063 | 21088 | |
| Self rated health less than good (n) | 6374 | 2881 | 2526 | 556 | 12337 | |
| Age adjusted prevalence rates (95% CI) | 57.8 (56.9 to 58.8) | 60.4 (59.1 to 61.8) | 59.3 (57.9 to 60.7) | 53.0 (50.0 to 56.0) | 58.6 (58.0 to 59.3) | |
| Odds ratio (95% CI) | 1.07 (0.94 to 1.23) | 1.20 (1.05 to 1.37) | 1.12 (0.98 to 1.29) | 1.00 | ||
| RII (95% CI) | 0.96 (0.86 to 1.07) | |||||
| 1992 | ||||||
| Number of the surveyed | 9387 | 5584 | 5938 | 1519 | 22428 | |
| Self rated health less than good (n) | 6597 | 3671 | 3659 | 895 | 14822 | |
| Age adjusted prevalence rates (95% CI) | 67.0 (66.0 to 67.9) | 67.8 (66.5 to 69.0) | 63.7 (62.5 to 64.9) | 58.9 (56.4 to 61.4) | 66.2 (65.5 to 66.8) | |
| Odds ratio (95% CI) | 1.26 (1.12 to 1.42) | 1.25 (1.11 to 1.41) | 1.12 (1.00 to 1.25) | 1.00 | ||
| RII (95% CI) | 1.21 (1.09 to 1.35) | |||||
| 1995 | ||||||
| Number of the surveyed | 7219 | 5419 | 7373 | 2048 | 22059 | |
| Self rated health less than good (n) | 5232 | 3729 | 4646 | 1221 | 14828 | |
| Age adjusted prevalence rates (95% CI) | 68.2 (67.1 to 69.3) | 69.2 (68.0 to 70.4) | 65.3 (64.2 to 66.3) | 60.5 (58.3 to 62.6) | 67.4 (66.8 to 68.0) | |
| Odds ratio (95% CI) | 1.34 (1.20 to 1.50) | 1.34 (1.20 to 1.49) | 1.13 (1.02 to 1.25) | 1.00 | ||
| RII (95% CI) | 1.35 (1.21 to 1.50) | |||||
| 1999 | ||||||
| Number of the surveyed | 4767 | 4144 | 7610 | 2307 | 18828 | |
| Self rated health less than good (n) | 3710 | 3025 | 4780 | 1360 | 12875 | |
| Age adjusted prevalence rates (95% CI) | 73.5 (72.3 to 74.8) | 72.5 (71.2 to 73.9) | 65.3 (64.3 to 66.4) | 59.8 (57.7 to 61.8) | 68.4 (67.7 to 69.0) | |
| Odds ratio (95% CI) | 1.81 (1.60 to 2.04) | 1.60 (1.43 to 1.79) | 1.14 (1.03 to 1.25) | 1.00 | ||
| RII (95% CI) | 1.94 (1.72 to 2.19) | |||||
| RII trend (p value) | <0.0001 | |||||