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Table 3 Incidence rate ratios and their 95 % confidence intervals for work ability as a predictor of mobility limitation. Unadjusted and mortality- and covariate-adjusted models presented for all, men and women

From: Midlife work ability and mobility limitation in old age among non-disability and disability retirees - a prospective study

  All (n = 4329) Men (n = 1826) Women (n = 2503)
  95 % Confidence interval   95 % Confidence interval   95 % Confidence interval
IRR Lower Upper IRR Lower Upper IRR Lower Upper
Unadjusted Modela          
 Non-disability 0.88 0.87 0.89 0.87 0.85 0.88 0.89 0.88 0.91
 CVD 0.94 0.92 0.96 0.93 0.91 0.95 0.97 0.93 1.01
 Musculoskeletal 0.95 0.94 0.96 0.95 0.93 0.97 0.95 0.94 0.97
 Mental disorder 0.93 0.90 0.95 0.90 0.86 0.94 0.94 0.91 0.97
 Other 0.96 0.94 0.97 0.97 0.94 0.99 0.94 0.91 0.97
Mortality and covariate adjusted Modelb c          
 Non-disability 0.91 0.90 0.92 0.88 0.85 0.91 0.92 0.91 0.93
 CVD 0.95 0.93 0.98 0.95 0.92 0.98 0.97 0.93 1.02
 Musculoskeletal 0.96 0.95 0.97 0.96 0.94 0.99 0.96 0.94 0.98
 Mental disorders 0.96 0.92 0.99 0.94 0.88 1.01 0.97 0.93 1.01
 Other 0.97 0.95 0.99 0.98 0.95 1.02 0.95 0.92 0.99
  1. Bold typeface indicates effect significant at the level of p ≤ 0.05
  2. aOffset term for time in follow-up was used for the mobility outcome
  3. b Covariates included in the model were marital status, occupational class, chronic illnesses, and lifestyle factors
  4. cMissing data in covariates adjusted for by maximum likelihood estimation under the assumption of missing-at-random