Table 5.

Multivariate logistic regression models

	SRD related	Co-existent SRD	All patients
Age (standardised)	0.13* (0.02; 0.56)	0.53 (0.26; 1.11)	0.48* (0.25; 0.91)
CCI	1.42 (0.86; 2.55)	0.99 (0.73; 1.34)	1.01 (0.78; 1.29)
Disease duration (log)	0.86 (0.71; 1.00)	0.89 (0.75; 1.05)	0.97 (0.89; 1.07)
Consultation	0.59 (0.05; 5.64)	2.10 (0.64; 6.87)	1.08 (0.45; 2.61)
SOFA hepatic	0.69 (0.30; 1.46)	0.65 (0.39; 1.06)	0.55** (0.37; 0.82)
GC hospitalisation (log)	0.75 (0.48; 1.12)	0.85 (0.61; 1.19)	0.78* (0.61; 1.00)
GC ICU (log)	0.81 (0.54; 1.11)	0.93 (0.73; 1.20)	0.85 (0.71; 1.03)
LOS (log)	0.71 (0.43; 1.10)	0.88 (0.70; 1.11)	0.88 (0.72; 1.06)
Rheumatic disease
RA versus CTD		1.04 (0.27; 3.98)	0.99 (0.30; 3.23)
RA versus SpA		1.43 (0.26; 7.97)	1.17 (0.21; 6.56)
RA versus vasculitis		6.17 (0.98; 39.10)	6.14* (1.50; 25.10)
RA versus other		1.24 (0.25; 6.19)	2.95 (0.68; 12.82)
N	56	126	182
R2	0.50	0.28	0.28

ORs are provided for each predictor, followed by 95% CIs. Nagelkerke pseudo-R² and included sample size (N) are provided for each model. *p<0.05; **p<0.01. Log indicates that logarithmic transformation was applied.

CCI, Charlson Comorbidity Index; Consultation, consultation by a rheumatologist; CTD, connective tissue disease; GC hospitalisation, glucocorticoid therapy prior admission to hospital; ICU, intensive care unit; GC ICU, glucocorticoid therapy prior admission to ICU; LOS, length of stay; RA, rheumatoid arthritis; SOFA, Sequential Organ Failure Assessment Score; SpA, seronegative spondyloarthropathies.