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Table 5 Results on the association between the frailty and sarcopenia status and the hospitalization-related outcomes, both at the cross-sectional level and at-follow up

From: Healthcare cost expenditures associated to frailty and sarcopenia

 

Cross-sectional analysis

At follow-up

Frailty measured with the Frailty Index

Frailty measured with the FTS5

Frailty measured with the Frailty Index

Frailty measured with the FTS5

Model 1

Non-frail # without sarcopenia

Ref.

Ref.

Ref.

Ref.

Non-frail # with sarcopenia

 OR on the probability of being admitted to hospital

1.295 (0.908–1.828)

1.388 (0.949–2.030)

1.357 (0.991–1.871)

1.293 (0.916–1.827)

 Coeff on number of hospital admissions

0.258 (− 0.443–0.959)

0.101 (− 0.683–0.884)

− 0.095 (− 0.618–0.429)

− 0.335 (− 0.728–0.059)

 Coeff on length of hospitalization

0.264 (− 0.185–0.713)

0.007 (− 0.452–0.466)

−0.125 (− 0.487–0.238)

−0.122 (− 0.527–0.282)

 Coeff on hospitalization costs

−0.005 (− 0.327–0.317)

0.043 (− 0.341–0.427)

− 0.096 (− 0.377–0.185)

−0.177 (− 0.429–0.075)

Frail # without sarcopenia

 OR on the probability of being admitted to hospital

2.926** (1.367–6.262)

1.334 (0.533–3.339)

2.771** (1.333–5.760)

3.175** (1.492–6.754)

 Coeff on number of hospital admissions

0.391 (− 0.694–1.477)

0.467 (− 0.311–1.245)

0.733** (0.241–1.226)

0.165 (− 0.561–0.891)

 Coeff on length of hospitalization

1.302*** (0.745–1.859)

0.891** (0.261–1.521)

0.985** (0.371–1.599)

0.337 (− 0.510–1.184)

 Coeff on hospitalization costs

0.380 (− 0.240–1.001)

0.362* (0.070–0.795)

0.259 (− 0.207–0.726)

−0.045 (− 0.579–0.490)

Frail # with sarcopenia

 OR on the probability of being admitted to hospital

3.316*** (1.854–5.931)

1.768* (1.113–2.740)

2.621*** (1.485–4.624)

2.025*** (1.376–3.116)

 Coeff on number of hospital admissions

0.232 (− 0.568–1.031)

0.406 (−0.343–1.154)

0.443* (0.052–0.834)

0.307 (− 0.194–0.807)

 Coeff on length of hospitalization

0.424 (− 0.146–0.994)

0.436 (−0.080–0.951)

0.458* (0.038–0.878)

0.101 (− 0.287–0.488)

 Coeff on hospitalization costs

−0.005 (− 0.505–0.496)

0.169* (0.144–0.194)

0.093 (− 0.218–0.403)

0.057 (−0.296–0.411)

Model 2

Non-frail # without sarcopenia

Ref.

Ref.

Ref.

Ref.

Non-frail # with sarcopenia

 OR on the probability of being admitted to hospital

1.324 (0.895–1.941)

1.427 (0.943–2.162)

1.681** (1.200–2.411)

1.640* (1.119–2.395)

 Coeff on number of hospital admissions

0.567 (−0.340–1.474)

0.401 (− 0.579–1.380)

−0.100 (− 0.737–0.536)

−0.340 (− 0.795–0.115)

 Coeff on length of hospitalization

0.314 (− 0.229–0.857)

0.034 (− 0.479–0.547)

−0.203 (− 0.661–0.255)

−0.211 (− 0.691–0.269)

 Coeff on hospitalization costs

0.078 (− 0.248–0.405)

0.111 (− 0.271–0.493)

−0.085 (− 0.374–0.203)

−0.158 (− 0.425–0.109)

Frail # without sarcopenia

 OR on the probability of being admitted to hospital

2.216 (0.994–4.945)

0.940 (0.361–2.448)

2.109 (0.977–4.545)

2.785* (1.187–6.540)

 Coeff on number of hospital admissions

0.416 (− 0.823–1.655)

0.363 (−0.778–1.504)

0.687* (0.135–1.240)

0.321 (− 0.410–1.053)

 Coeff on length of hospitalization

1.256*** (0.716–1.796)

0.945** (0.380–1.510)

0.918** (0.250–1.585)

0.349 (−0.538–1.235)

 Coeff on hospitalization costs

0.379(− 0.205–0.962)

0.258* (0.131–0.385)

0.312 (− 0.139–0.763)

0.100 (−0.410–0.610)

Frail # with sarcopenia

 OR on the probability of being admitted to hospital

2.837*** (1.501–5.370)

1.561 (0.933–2.553)

2.638** (1.428–4.847)

2.305*** (1.495–3.726)

 Coeff on number of hospital admissions

0.518 (− 0.389–1.424)

0.682 (−0.196–1.559)

0.437* (0.014–0.860)

0.316 (− 0.275–0.906)

 Coeff on length of hospitalization

0.428 (− 0.202–1.057)

0.400 (−0.189–0.990)

0.371 (− 0.102–0.843)

0.014 (− 0.428–0.456)

 Coeff on hospitalization costs

0.114 (−0.390–0.618)

0.054* (0.001–0.107)

0.167 (− 0.154–0.488)

0.091 (−0.271–0.452)

Model 3

Non-frail # without sarcopenia

Ref.

Ref.

Ref.

Ref.

Non-frail # with sarcopenia

 OR on the probability of being admitted to hospital

1.170 (0.786–1.729)

1.252 (0.820–1.911)

1.483* (1.057–2.144)

1.469* (1.002–2.149)

 Coeff on number of hospital admissions

0.401 (−0.437–1.240)

0.255 (− 0.664–1.174)

−0.163 (− 0.747–0.421)

−0.466 (− 0.903–0.029)

 Coeff on length of hospitalization

0.156 (− 0.368–0.680)

−0.096 (− 0.597–0.405)

−0.295 (− 0.741–0.150)

−0.381 (− 0.867–0.105)

 Coeff on hospitalization costs

0.057 (− 0.261–0.376)

0.073 (− 0.287–0.433)

−0.131 (− 0.398–0.135)

−0.219 (− 0.486–0.048)

Frail # without sarcopenia

 OR on the probability of being admitted to hospital

1.628 (0.730–3.624)

0.708 (0.264–1.893)

1.556 (0.728–3.348)

2.217 (0.918–5.383)

 Coeff on number of hospital admissions

0.043 (−1.040–1.125)

0.143 (−0.773–1.059)

0.539* (0.026–1.051)

0.133 (− 0.566–0.832)

 Coeff on length of hospitalization

0.831** (0.300–1.363)

0.511* (0.055–0.966)

0.701* (0.108–1.294)

0.090 (−0.768–0.947)

 Coeff on hospitalization costs

0.179 (− 0.368–0.726)

0.337 (− 0.087–0.761)

0.201 (−0.242–0.644)

0.125 (− 0.219–0.469)

Frail # with sarcopenia

 OR on the probability of being admitted to hospital

2.255* (1.174–4.333)

1.289* (1.043–1.675)

2.041* (1.093–3.803)

1.869** (1.199–3.094)

 Coeff on number of hospital admissions

0.204 (−0.639–1.046)

0.451 (− 0.350–1.251)

0.315 (− 0.102–0.731)

0.246 (−0.277–0.769)

 Coeff on length of hospitalization

0.166 (− 0.442–0.775)

0.183 (− 0.387–0.754)

0.209 (−0.250–0.667)

−0.072 (− 0.492–0.347)

 Coeff on hospitalization costs

−0.050 (− 0.488–0.387)

0.106* (0.0002–0.211)

0.114 (− 0.220–0.448)

0.046* (0.00005–0.092)

  1. 95% confidence intervals in parentheses. *** p < 0.001, ** p < 0.01, * p < 0.05
  2. Model 1 includes the interaction term between frailty status, measured by the Frailty Index or the Frailty Trait Score, and sarcopenia as the only independent variable. Model 2 enters sociodemographic characteristics (age and its square and gender) in addition to the interaction term from Model 1. Model 3 adds to Model 2 the comorbidity severity of individual according to the Charlson Index, which is medium-low if the Charlson Index score is 1 or 2; and high if the Charlson Index score is three or higher. Moreover, polypharmacy is also included if the daily number of drugs the subject is taking is 5 or more