From: Increase of mild disability in Japanese elders: A seven year follow-up cohort study
 |  | outcome level | |||||
---|---|---|---|---|---|---|---|
 |  | mild |  |  | severe |  |  |
Gender | Covariate | R.R | 95% C.I. | P | R.R | 95% C.I. | P |
Male | Â | Â | Â | Â | Â | Â | Â |
 | age* | 2.5 | (1.4–4.5) | P < 0.01 | 5.3 | (2.1–13.2) | P < 0.01 |
 | chronic arthritis | 1.9 | (0.6–6.2) |  | 1.6 | (0.3–8.6) |  |
 | osteoporosis†| 4.4 | (0.5–36.2) |  | n.a |  |  |
 | bone fracture | 2.6 | (0.8–8.1) |  | 1.7 | (0.2–14.8) |  |
 | CVA§ | 5.6 | (1.7–19.1) | P < 0.01 | 20.3 | (5.2–78.6) | P < 0.01 |
 | diabetes | 1.2 | (0.4–3.1) |  | 2.5 | (0.6–10.1) |  |
 | chronic lung disease | 2.2 | (0.9–5.6) |  | 2.9 | (0.7–12.0) |  |
 | eye disease | 1.0 | (0.4–2.4) |  | 1.0 | (0.3–3.6) |  |
 | malignancy†| 5.4 | (1.6–18.3) | P < 0.01 | n.a |  |  |
Female | Â | Â | Â | Â | Â | Â | Â |
 | age* | 4.9 | (3.4–7.1) | P < 0.01 | 9.0 | (4.4–18.2) | P < 0.01 |
 | chronic arthritis | 2.8 | (1.5–5.2) | P < 0.01 | 5.4 | (1.9–15.8) | P < 0.01 |
 | osteoporosis | 1.4 | (0.6–3.2) |  | 2.6 | (0.7–9.9) |  |
 | bone fracture | 1.3 | (0.6–3.1) |  | 1.1 | (0.3–4.9) |  |
 | CVA§ | 3.4 | (0.6–19.8) |  | 22.3 | (2.5–198.5) | P < 0.01 |
 | diabetes | 2.6 | (1.2–5.9) | P < 0.05 | 1.5 | (0.2–13.2) |  |
 | chronic lung disease | 0.3 | (0.1–1.1) |  | 1.5 | (0.3–8.0) |  |
 | eye disease | 1.1 | (0.6–1.8) |  | 0.8 | (0.3–2.3) |  |
 | malignancy†| 0.8 | (0.3–2.3) |  | n.a |  |  |