Table 6 Univariate log-transformed linear regression of ICU and hospital length of stay.

From: Outcomes of septic shock from urinary and non-urinary sources in nonagenarians and centenarians admitted to intensive care units

 

Unmatched cohort

Matched cohort

Variable

Coefficient (95% CI)

p value

Coefficient (95% CI)

p value

ICU length of stay

Non-UTI versus UTI Septic Shock

1.018 (0.924–1.122)

0.716

1.024 (0.909–1.154)

0.691

Age (per year)

0.983 (0.961–1.005)

0.129

0.996 (0.967–1.027)

0.809

Sex (male vs. female)

1.087 (0.992–1.192)

0.073

1.074 (0.951–1.213)

0.252

SOFA Score (per point)

1.011 (0.995–1.028)

0.191

1.016 (0.993–1.040)

0.168

APACHE III Score (per point)

0.999 (0.997–1.002)

0.532

1.003 (1.000–1.006)

0.072

Elective Admission (yes vs. no)

1.123 (0.776–1.627)

0.538

0.736 (0.380–1.425)

0.362

Hospital length of stay

Non-UTI versus UTI Septic Shock

0.947 (0.837–1.072)

0.390

0.976 (0.838–1.137)

0.754

Age (per year)

0.981 (0.953–1.009)

0.182

1.004 (0.966–1.043)

0.858

Sex (male vs. female)

1.110 (0.988–1.248)

0.078

1.060 (0.907–1.239)

0.460

SOFA Score (per point)

0.940 (0.921–0.959)

 < 0.001*

0.954 (0.926–0.982)

0.002*

APACHE III Score (per point)

0.989 (0.986–0.992)

 < 0.001*

0.993 (0.989–0.997)

0.001*

Elective Admission (yes vs. no)

1.659 (1.038–2.649)

0.034

1.541 (0.664–3.575)

0.314

  1. Coefficients represent exponentiated β estimates from univariate linear regression models with log-transformed length of stay (in hours) as the outcome. Separate models were fitted for each predictor in the matched and unmatched cohorts. Exponentiated coefficients are interpreted as geometric mean ratios. A value > 1 indicates longer ICU stay. Confidence intervals (CIs) were calculated at the 95% level with robust standard errors. No variable reached statistical significance in either cohort. p values < 0.001 are denoted with an asterisk (*).
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