Table 3.

Rating of change in the Laval Questionnaire and the SF-36 after bariatric surgery (n = 48)

Questionnaires	Mean (SD)	SRM*	25%	Median	75%	Range	p value†
Laval Questionnaire
• Symptoms	2.1 (1.2)	1.8	1.4	2.2	3.2	-1.6 - 4.3	<0.0001
• Activity/Mobility	3.2 (1.6)	2.0	2.3	3.4	4.3	-0.2 - 5.6	<0.0001
• Personal hygiene/Clothing	3.4 (1.6)	2.1	2.0	3.4	4.8	0.6 - 6.0	<0.0001
• Emotions	2.3 (1.4)	1.6	1.3	2.3	3.2	-0.4 - 5.6	<0.0001
• Social interactions	2.8 (1.6)	1.8	1.5	2.9	3.9	-1.3 - 5.7	<0.0001
• Sexual life	2.5 (1.7)	1.5	1.0	2.5	4.0	-0.5 - 6.0	<0.0001
SF-36
• Physical functioning	48.5 (27.8)	1.7	30.0	55.0	70.0	-25.0 - 90.0	<0.0001
• Role - physical	50.5 (47.1)	1.1	0.0	75.0	100.0	-75.0 - 100.0	<0.0001
• Bodily pain	27.2 (26.4)	1.0	10.0	31.2	42.5	-34.0 - 82.0	<0.0001
• General health perception	33.0 (27.8)	1.2	15.8	33.0	51.1	-37.0 - 85.0	<0.0001
• Energy/vitality	22.4 (22.6)	1.0	10.0	22.5	43.8	-25.0 - 70.0	<0.0001
• Social functioning	30.2 (35.0)	0.9	0.0	25.0	62.5	-37.5 - 100.0	<0.0001
• Role - emotions	31.2 (56.9)	0.5	0.0	0.0	100.0	-100.0 - 100.0	0.0004
• Mental health	12.6 (22.4)	0.6	-4.0	12.0	28.0	-44.0 - 52.0	0.0004
IWQOL-Lite
• Physical Function	53.0 (24.5)	2.2	34.1	56.8	70.4	-9.1 - 100.0	<0.0001
• Self-Esteem	46.2 (29.8)	1.6	21.4	46.4	67.9	-3.6 - 100.0	<0.0001
• Sexual Life	29.6 (36.9)	0.8	0.0	25.0	51.6	-56.2 - 100.0	<0.0001
• Public Distress	49.9 (27.1)	1.8	25.0	55.0	71.25	-10.0 - 95.0	<0.0001
• Work	41.1 (30.0)	1.4	25.0	37.5	62.5	-25.0 - 100.0	<0.0001

* SRM: standardized response mean = magnitude of change/the standard deviation of change [25]. The larger the standardized response mean, the more responsive to change the questionnaire.

† p value attached to the within-group differences in scores in the patients who were treated over the study period (paired t-tests).