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Table 1 Estimated odds ratios from fixed effects and random intercept model

From: Validation of prediction models: examining temporal and geographic stability of baseline risk and estimated covariate effects

Variable Model 1—fixed effects model Model 2—random intercept model
Odds ratio 95% confidence interval Odds ratio 95% confidence interval
Age (per year increase) 1.042 (1.038, 1.047) 1.043 (1.039, 1.047)
Systolic blood pressure (per mmHg) 0.987 (0.985, 0.988) 0.987 (0.985, 0.988)
Respiratory rate (per breath) 1.026 (1.019, 1.032) 1.025 (1.019, 1.031)
Serum urea nitrogen 1.105 (1.096, 1.114) 1.106 (1.097, 1.115)
Low-sodium serum concentration (<136 mEq/L) 1.365 (1.249, 1.493) 1.364 (1.246, 1.493)
Low serum hemoglobin (<10.0 g/dL) 1.181 (1.057, 1.319) 1.172 (1.049, 1.310)
Cancer 1.668 (1.492, 1.864) 1.682 (1.504, 1.882)
Chronic obstructive pulmonary disease 1.331 (1.221, 1.450) 1.329 (1.219, 1.450)
Cerebrovascular disease 1.328 (1.207, 1.461) 1.326 (1.204, 1.460)
Hepatic cirrhosis 1.91 (1.253, 2.910) 1.914 (1.253, 2.924)
Dementia 2.124 (1.877, 2.402) 2.136 (1.887, 2.419)