An exploration of diabetic foot screening procedures data by a multiple correspondence analysis Cover

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An exploration of diabetic foot screening procedures data by a multiple correspondence analysis

Slovenian Journal of Public Health

Volume 56 (2017): Issue 1 (March 2017)

By: Vilma Urbančič Rovan and Jože Rovan

Open Access

|Nov 2016

Figures & Tables

A two-dimensional map – a display of all categories (extended labels in Appendix 2).

A zoom-in display of the upper part of Figure 2.

The first two principal coordinates of the matrix Y_

	1. principal coordinate	2. principal coordinate
SEXF	0.045545	0.264007
SEXM	-0.036950	-0.214184
NSY0	-0.337288	-0.219527
NSY1	0.414879	0.270028
HVA0	-0.071098	-0.165217
HVA1	0.340644	0.791587
⋮	⋮	⋮
AMP0	-0.011657	-0.010940
AMP1	1.919002	1.801034

The matrix of row profiles (source: Table 2)_

	SEXF	SEXM	NSY0	NSY1	⋯	AMP0	AMP1	Total
SEXF	4.1667	0.0000	2.0212	2.1455		4.1458	0.0209	100
SEXM	0.0000	4.1667	2.5230	1.6436		4.1380	0.0286	100
NSY0	1.6413	2.5254	4.1667	0.0000		4.1543	0.0124	100
NSY1	2.1430	2.0236	0.0000	4.1667		4.1258	0.0409	100
⋮	⋮	⋮	⋮	⋮		⋮	⋮	⋮
AMP0	1.8682	2.2985	2.3053	1.8613	⋯	4.1667	0.0000	100
AMP1	1.5476	2.6190	1.1310	3.0357	⋯	0.0000	4.1667	100
Total	1.8663	2.3004	2.2982	1.8684	⋯	4.1415	0.0252	100

Risk status classification_

Category	Description
1	Normal sensation, palpable pedal pulses, no foot deformity
2	Impaired sensation, no foot deformity
3	Absent pedal pulses, normal sensation, no foot deformity
4	Combination: foot deformity and impaired sensation and / or absent foot pulses Previous ulcer or amputation Charcot foot

The Burt matrix, the presentation of crosstabulations reduced to the first two variables and the last variable (the complete matrix at (19))_

	SEXF	SEXM	NSY0	NSY1	⋯	AMP0	AMP1	Total
SEXF	5193	0	2519	2674	⋯	5167	26	124632
SEXM	0	6401	3876	2525	⋯	6357	44	153624
NSY0	2519	3876	6395	0	⋯	6376	19	153480
NSY1	2674	2525	0	5199	⋯	5148	51	124776
⋮	⋮	⋮	⋮	⋮		⋮	⋮	⋮
AMP0	5167	6357	6376	5148	⋯	11524	0	276576
AMP1	26	44	19	51	⋯	0	70	1680
Total	124632	153624	153480	124776	⋯	276576	1680	6678144

The adjustment of inertias_

	Singular values δ_i	Burt principal inertia λ_i	Adjusted inertia λ~k$\bf {\tilde \lambda _k}$	Percentage of adjusted inertia	Cumulative percentage of adjusted inertia	16 32 48 64 80
1	0.20583	0.04237	0.02934	66.72182	66.72182	**********************
2	0.11983	0.01436	0.00665	15.12592	81.84773	***
3	0.07324	0.00536	0.00109	2.46806	84.31580	*
4	0.06369	0.00406	0.00053	1.20083	85.51663
5	0.04969	0.00247	0.00007	0.15938	85.67600
6	0.04743	0.00225	0.00004	0.08224	85.75824
7	0.04398	0.00193	0.00001	0.01325	85.77149
8	0.04196	0.00176	0.00000	0.00021	85.77170
9	0.04174	0.04398	0.00174	0.00000	0.00001	85.77171
⋮	⋮	⋮
ϕ¯2${\bar \phi ^2}$ = 0.04398

DOI: https://doi.org/10.1515/sjph-2017-0009 | Journal eISSN: 1854-2476 | Journal ISSN: 0351-0026

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Language: English

Page range: 65 - 73

Submitted on: Feb 16, 2016

|

Accepted on: Aug 16, 2016

|

Published on: Nov 7, 2016

Published by: National Institute of Public Health, Slovenia

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

Related subjects:

Clinical medicine,

Hygiene and environmental medicine

© 2016 Vilma Urbančič Rovan, Jože Rovan, published by National Institute of Public Health, Slovenia
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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