Table 4.

Multivariable analysis of factors associated with health utility (EQ-5D score)

	Beta	95% CI	p
Factor
Gender (male v female)	0.049	0.016, 0.082	0.003
Previous hospital admission within 30 days (yes v no)	-0.101	-0.138, -0.064	< 0.001
ICD-10 code
Certain infectious and parasitic diseases	(reference)		< 0.001
Diseases of the circulatory system	0.043	-0.066, 0.151
Diseases of the digestive system	0.119	0.003, 0.235
Diseases of the genitourinary system	-0.007	-0.133, 0.120
Diseases of the musculoskeletal system and connective tissue	-0.091	-0.238, 0.057
Diseases of the nervous system	0.127	-0.009, 0.263
Diseases of the respiratory system	0.053	-0.056, 0.163
Diseases of the skin and subcutaneous tissue	-0.275	-0.526, -0.023
Endocrine, nutritional and metabolic diseases	0.180	0.011, 0.348
Injury, poisoning and certain other consequences of external causes	-0.012	-0.123, 0.100
Mental and behavioural disorders	-0.014	-0.165, 0.137
Neoplasms	-0.091	-0.253, 0.072
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified	0.085	-0.024, 0.194
Other	0.128	-0.042, 0.298
Unknown
History of chronic respiratory disease	-0.094	-0.144, -0.043	< 0.001
History of active malignancy	-0.111	-0.190, -0.032	0.006
History of diabetes	-0.072	-0.118, -0.026	0.002
History of epilepsy	-0.101	-0.186, -0.016	0.021
On steroid therapy	-0.105	-0.169, -0.041	0.001
Age *			< 0.001
Glasgow coma scale *			< 0.001

* EQ5D was reduced with increased age and lower GCS; both were monotonic but non-linear decreases for which a quadratic model produced an adequate fit, Age: Fitted line is -0.0015*Age-0.000018*Age², GCS: Fitted line is 0.0043*GCS +0.000852*GCS²

R-squared statistic for the model = 12.6%.