Adaptation and validation of the Michigan Incontinence Severity Index in a Turkish population

Figures & data

Table 1 The demographic characteristics of the participants

Characteristics	Min–Max	Mean ± SD
Age, years	35–67	50.60±8.69
BMI, (kg/m^2)	19.84–41.44	28.57±4.18
Gravida, n	0–7	3.54±1.57
Parite, n	0–6	2.65±1.22
Abortus, n	0–2	0.38±0.58
Curettage, n	0–2	0.51±0.76
Education, n (%)
Primary	35	35.0
Secondary	48	48.0
Higher	17	17.0

Abbreviations: BMI, body mass index; SD, standard deviation; Min, minimum; Max, maximum.

Table 2 The exploratory factor analysis

Questions	Factor 1	Factor 2	Factor 3
Item 1	0.848
Item 2	0.803
Item 3	0.782
Item 4		0.835
Item 5		0.855
Item 6		0.873
Item 7			0.734
Item 8			0.542
Item 9			0.869
Item 10			0.769

Notes: Factor 1: Originally named SUI. Factor 2: Originally named UUI. Factor 3: Combination of originally named pad usage and bother subdomains. Items 1–3 define the questions belonging to the SUI domain. Items 4–6 define the questions belonging to the UUI domain. Items 7 and 8 define the questions belonging to the pad usage domain. Items 9 and 10 define the questions belonging to the bother domain.

Abbreviations: SUI, stress urinary incontinence; UUI, urge urinary incontinence.

Table 3 Construct validity

Questions	Total severity	Severity subdomains			Bother	Pad use + bother
		SUI	UUI	Pad use
Item 1	0.624	0.871	0.122	0.521	0.427	0.470
Item 2	0.527	0.771	0.065	0.398	0.309	0.354
Item 3	0.645	0.839	0.157	0.562	0.419	0.514
Item 4	0.637	0.165	0.836	0.456	0.357	0.431
Item 5	0.641	0.094	0.892	0.493	0.426	0.475
Item 6	0.698	0.182	0.887	0.540	0.453	0.517
Item 7	0.698	0.480	0.377	0.832	0.713	0.833
Item 8	0.809	0.536	0.541	0.919	0.779	0.889
Item 9	0.661	0.434	0.396	0.798	0.963	0.884
Item 10	0.570	0.282	0.492	0.650	0.779	0.732

Notes: Items 1–3 define the questions belonging to the SUI domain. Items 4–6 define the questions belonging to the UUI domain. Items 7 and 8 define the questions belonging to the pad usage domain. Items 9 and 10 define the questions belonging to the bother domain. Spearman Rank correlation coefficient (r) was used to assess the correlation between the scale items and their related sub-domains. The highest correlations of each items are in bold.

Abbreviations: SUI, stress urinary incontinence; UUI, urge urinary incontinence.

Table 4 Correlations between the SUI, UUI, and SUI + UUI scores and ICIQ-SF scores for convergent validity

Scores	ICIQ-SF
	r	P-value
SUI	0.664	<0.001
UUI	0.751	<0.001
SUI + UUI	0.953	<0.001
Pad use	0.766	<0.001
Severity	0.946	<0.001
Bother	0.636	<0.001
M-ISI	0.929	<0.001

Abbreviations: ICIQ-SF, Incontinence Questionnaire – Short Form; M-ISI, Michigan Incontinence Severity Index; SUI, stress urinary incontinence; UUI, urge urinary incontinence.