TABLE 3.
Results of accelerated failure time model: Predicting survival time using VOA as socio-behavioral indicator of longevity.
| Predictor variables | Accelerated failure time (AFT) model |
||||
| Model 1 (n = 1,606) | Model 2 (n = 1,592) | Model 3 (n = 1,484) | Model 4 (n = 1,360) | Model 5 (n = 1,154) | |
| ETR [CI95] | ETR [CI95] | ETR [CI95] | ETR [CI95] | ETR [CI95] | |
| Socio-demographics | |||||
| Gender (ref.: Women) | 0.74 [0.58–0.94] | 0.73 [0.58–0.92] | 0.75 [0.59–0.96] | 0.72 [0.55–0.94] | 0.73 [0.55–0.98] |
| Age group (ref.: 90 years or older) | |||||
| – 80–84 years | 3.01 [2.16–4.20] | 2.64 [1.90–3.68] | 2.61 [1.85–3.69] | 2.77 [1.88–4.07] | 2.32 [1.52–3.55] |
| – 85–89 years | 2.01 [1.44–2.81] | 1.89 [1.36–2.63] | 1.88 [1.33–2.67] | 1.80 [1.23–2.64] | 1.65 [1.09–2.49] |
| Institutionalization (ref.: Private) | 0.42 [0.31–0.58] | 0.58 [0.42–0.81] | 0.56 [0.40–0.80] | 0.64 [0.43–0.96] | 1.02 [0.64–1.64] |
| Views of aging | |||||
| AARC-Gains (1–5) | 1.27 [1.11–1.46] | 1.30 [1.11–1.51] | 1.27 [1.08–1.50] | 1.13 [0.94–1.35] | |
| AARC-Losses (1–5) | 0.72 [0.63–0.81] | 0.67 [0.57–0.78] | 0.68 [0.57–0.80] | 0.81 [0.66–0.98] | |
| Appraisal of life | |||||
| Valuation of life–engagement (0–2) | 0.88 [0.69–1.14] | 0.70 [0.51–0.95] | 0.71 [0.50–1.01] | ||
| Valuation of life–optimism (0–2) | 1.02 [0.71–1.46] | 1.07 [0.71–1.61] | 0.91 [0.58–1.44] | ||
| Perceived obsolescence (1–4) | 1.00 [0.86–1.15] | 1.05 [0.89–1.23] | 0.97 [0.81–1.15] | ||
| Feeling needed by society (1–4) | 0.93 [0.82–1.04] | 0.90 [0.79–1.03] | 0.88 [0.77–1.01] | ||
| Perceived control | |||||
| Internal (1–4) | 1.11 [0.88–1.39] | 1.03 [0.80–1.34] | |||
| Powerful others (1–4) | 0.85 [0.72–1.01] | 0.90 [0.74–1.09] | |||
| Chance (1–4) | 1.12 [0.98–1.28] | 1.18 [1.02–1.37] | |||
| Health resources | |||||
| Treated health conditions (0–19) | 0.99 [0.93–1.06] | ||||
| ADL independence (0–2) | 1.75 [1.08–2.82] | ||||
| IADL independence (0–2) | 1.33 [0.86–2.07] | ||||
| Cognitive status (ref.: Beginning AD) | |||||
| – Age adequate function | 1.57 [0.98–2.53] | ||||
| – MCI | 1.19 [0.71–2.01] | ||||
| Scale | 1.65 [1.49– 1.83] | 1.61 [1.45–1.79] | 1.61 [1.44–1.79] | 1.65 [1.47–1.86] | 1.60 [1.40–1.82] |
| AIC/BIC | 2073.70/2106.07 | 2011.78/2054.88 | 1847.08/1937.97 | 1670.42/1749.03 | 1346.99/1448.83 |
Weighted data. ETR, event time ratio; CI95, 95% confidence interval. Parameter estimates significant at the p < 0.05 level are shown in bold font.