Registration of Health-Related Quality of Life in a Cohort of Patients Undergoing Cholecystectomy

Table 3

Standardized response means (SRMs). The higher the score the more impact from the intervention. Standardized response means show the responsiveness of a certain parameter’s effect on HRQoL. Thus equals the estimated HRQoL for the standard Swedish population. Responsiveness is showing the validity of SF-36 on gallstone surgery. High responsiveness proves that the instrument used for measuring the improvement after gallstone surgery, in this case SF-36, is reliable.

Subscale	Standardized response mean	95% Confidence interval
Physical functioning	0.22	0.11–0.33
Role physical	0.49	0.37–0.61
Bodily pain	0.93	0.78–1.07
General Health	0.21	0.10–0.32
Vitality	0.38	0.26–0.50
Social Functioning	0.46	0.33–0.59
Role-emotional	0.31	0.18–0.45
Mental health	0.26	0.15–0.36
Physical component score	0.53	0.41–0.65
Mental component score	0.29	0.17–0.41

Evaluation of SRM [10]:
(i) <0.20: trivial effect;
(ii) 0.20–0.50: small effect;
(iii) 0.50–0.80: moderate effect;
(iv) >0.80: large effect.