BMC Musculoskeletal Disorders

Table 3 OLS models on the predictive effects of ASA classes on HRQoL score preoperatively (n = 69,290)

From: Predictive ability of the American Society of Anaesthesiologists physical status classification system on health-related quality of life of patients after total hip replacement: comparisons across eight EQ-5D-3L value sets

Model components	Model estimates
	Patient-reported EQ VAS		Swedish VAS		German VAS		Danish VAS^b		UK VAS^b
	β	RSE^a	β	RSE^a	β	RSE^a	Β	RSE^a	β	RSE^a
Intercept	0.594^*	0.0017	0.562^*	0.0011	0.510^*	0.0010	0.461^*	0.0010	0.520^*	0.0014
ASA class II	−0.038^*	0.0020	−0.024^*	0.0014	− 0.022^*	0.0012	−0.024^*	0.0012	−0.030^*	0.0017
ASA class III	−0.084^*	0.0028	−0.060^*	0.0019	−0.053^*	0.0018	−0.061^*	0.0017	−0.078^*	0.0025
ASA class IV	−0.125^*	0.0151	−0.099^*	0.0100	−0.088^*	0.0095	−0.102^*	0.0104	− 0.138^*	0.0135
R²		0.0138		0.0145		0.0136		0.0188		0.0154
MAE		0.184		0.129		0.117		0.108		0.179
Normalized MAE		0.184		0.180		0.165		0.092		0.167
RMSE		0.222		0.153		0.140		0.138		0.195
Normalized RMSE		0.222		0.214		0.197		0.108		0.182
Spearman Rank correlation		0.129		0.112		0.162		0.132		0.125
Model components	Swedish TTO		German TTO^b		Danish TTO^b		UK TTO^b
Model components	β	RSE^a	β	RSE^a	β	RSE^a	Β	RSE^a
Intercept	0.749^*	0.0008	0.581^*	0.0020	0.577^*	0.0016	0.460^*	0.0023
ASA class II	−0.018^*	0.0010	−0.038^*	0.0025	−0.033^*	0.0020	−0.045^*	0.0027
ASA class III	−0.046^*	0.0014	−0.098^*	0.0035	−0.089^*	0.0030	−0.118^*	0.0039
ASA Class IV	−0.079^*	0.0079	−0.179^*	0.0190	−0.163^*	0.0174	−0.213^*	0.0215
R²		0.0156		0.0119		0.0150		0.0138
MAE		0.094		0.269		0.201		0.293
Normalized MAE		0.149		0.223		0.124		0.184
RMSE		0.114		0.278		0.227		0.311
Normalized RMSE		0.181		0.231		0.140		0.195
Spearman Rank correlation		0.114		0.125		0.141		0.116

MAE mean absolute error, RMSE root mean square error, RSE robust standard error
^*P < 0.001
^aHeteroskedasticity-consistent standard error;
^bHypothetical perspective

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ISSN: 1471-2474

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