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Convergent Validity of the PUTS

Convergent Validity of the PUTS
Convergent Validity of the PUTS

Premonitory urges are a cardinal feature in Gilles de la Tourette syndrome. Severity of premonitory urges can be assessed with the "Premonitory Urge for Tic Disorders Scale" (PUTS). However, convergent validity of the measure has been difficult to assess due to the lack of other urge measures. We investigated the relationship between average real-time urge intensity assessed by an in-house developed real-time urge monitor (RUM), measuring urge intensity continuously for 5 min on a visual analog scale, and general urge intensity assessed by the PUTS in 22 adult Tourette patients (mean age 29.8 ± 10.3 SD, 19 males). Additionally, underlying factors of premonitory urges assessed by the PUTS were investigated in the adult sample using factor analysis and were replicated in 40 children and adolescents diagnosed with Tourette syndrome (mean age 12.05 ± 2.83 SD, 31 males). Cronbach's α for the PUTS 10 was acceptable (α = 0.79) in the adult sample. Convergent validity between average real-time urge intensity scores (as assessed with the RUM) and the 10-item version of the PUTS (r = 0.64) and the 9-item version of the PUTS (r = 0.66) was good. A factor analysis including the 10 items of the PUTS and average real-time urge intensity scores revealed three factors. One factor included the average real-time urge intensity score and appeared to measure urge intensity, whereas the other two factors can be assumed to reflect the (sensory) quality of urges and subjective control, respectively. The factor structure of the 10 PUTS items alone was replicated in a sample of children and adolescents. The results indicate that convergent validity between the PUTS and the real-time urge assessment monitor is good. Furthermore, the results suggest that the PUTS might assess more than one dimension of urges, and it may be worthwhile developing different subscales of the PUTS assessing premonitory urges in terms of intensity and quality, as well as subjectively experienced control over tics and premonitory urges.

Journal Article
1664-0640
1-7
Brandt, Valerie Cathérine
e41f5832-70e4-407d-8a15-85b861761656
Beck, Christian
295b6a7f-13d4-4b89-8c70-d2c0ed8fc737
Sajin, Valeria
667cd9e9-7ea2-4d57-99cb-9b9769a4d922
Anders, Silke
4f965858-44ca-464d-afcb-d40a1ff20f9b
Münchau, Alexander
3254c1b7-9fd4-417d-96e2-b7bc1fe3c736
Brandt, Valerie Cathérine
e41f5832-70e4-407d-8a15-85b861761656
Beck, Christian
295b6a7f-13d4-4b89-8c70-d2c0ed8fc737
Sajin, Valeria
667cd9e9-7ea2-4d57-99cb-9b9769a4d922
Anders, Silke
4f965858-44ca-464d-afcb-d40a1ff20f9b
Münchau, Alexander
3254c1b7-9fd4-417d-96e2-b7bc1fe3c736

Brandt, Valerie Cathérine, Beck, Christian, Sajin, Valeria, Anders, Silke and Münchau, Alexander (2016) Convergent Validity of the PUTS. Frontiers in Psychiatry, 7, 1-7. (doi:10.3389/fpsyt.2016.00051).

Record type: Article

Abstract

Premonitory urges are a cardinal feature in Gilles de la Tourette syndrome. Severity of premonitory urges can be assessed with the "Premonitory Urge for Tic Disorders Scale" (PUTS). However, convergent validity of the measure has been difficult to assess due to the lack of other urge measures. We investigated the relationship between average real-time urge intensity assessed by an in-house developed real-time urge monitor (RUM), measuring urge intensity continuously for 5 min on a visual analog scale, and general urge intensity assessed by the PUTS in 22 adult Tourette patients (mean age 29.8 ± 10.3 SD, 19 males). Additionally, underlying factors of premonitory urges assessed by the PUTS were investigated in the adult sample using factor analysis and were replicated in 40 children and adolescents diagnosed with Tourette syndrome (mean age 12.05 ± 2.83 SD, 31 males). Cronbach's α for the PUTS 10 was acceptable (α = 0.79) in the adult sample. Convergent validity between average real-time urge intensity scores (as assessed with the RUM) and the 10-item version of the PUTS (r = 0.64) and the 9-item version of the PUTS (r = 0.66) was good. A factor analysis including the 10 items of the PUTS and average real-time urge intensity scores revealed three factors. One factor included the average real-time urge intensity score and appeared to measure urge intensity, whereas the other two factors can be assumed to reflect the (sensory) quality of urges and subjective control, respectively. The factor structure of the 10 PUTS items alone was replicated in a sample of children and adolescents. The results indicate that convergent validity between the PUTS and the real-time urge assessment monitor is good. Furthermore, the results suggest that the PUTS might assess more than one dimension of urges, and it may be worthwhile developing different subscales of the PUTS assessing premonitory urges in terms of intensity and quality, as well as subjectively experienced control over tics and premonitory urges.

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Accepted/In Press date: 23 March 2016
e-pub ahead of print date: 7 April 2016
Published date: 7 April 2016
Keywords: Journal Article

Identifiers

Local EPrints ID: 413056
URI: https://eprints.soton.ac.uk/id/eprint/413056
ISSN: 1664-0640
PURE UUID: 9414101b-9856-4955-9c99-f3efc575811d

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Date deposited: 14 Aug 2017 16:31
Last modified: 13 Mar 2019 20:11

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Author: Christian Beck
Author: Valeria Sajin
Author: Silke Anders
Author: Alexander Münchau

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