Skip to main content
Top
Gepubliceerd in: Quality of Life Research 6/2013

01-08-2013

Factor analytic and item response theory evaluation of the Penn State Worry Questionnaire in women with cancer

Auteurs: Salene M. Wu, Tammy A. Schuler, Michael C. Edwards, Hae-Chung Yang, Brittany M. Brothers

Gepubliceerd in: Quality of Life Research | Uitgave 6/2013

Log in om toegang te krijgen
share
DELEN

Deel dit onderdeel of sectie (kopieer de link)

  • Optie A:
    Klik op de rechtermuisknop op de link en selecteer de optie “linkadres kopiëren”
  • Optie B:
    Deel de link per e-mail

Abstract

Purpose

Cancer survivors frequently experience worry about a variety of topics, including fear of recurrence. However, general measures of worry still require examination of reliability for this vulnerable population. This study utilized modern psychometric methods to examine the reliability of a worry measure in women with breast or gynecologic cancer.

Methods

Women with cancer (n = 332) completed the 16-item Penn State Worry Questionnaire (PSWQ), which has an abbreviated 8-item version (PSWQ-A). Categorical confirmatory factor analysis (CCFA) was used to determine the factor structure and item response theory (IRT) was used to examine score reliability.

Results

CCFA supported a two-factor structure with 11 positively worded items and the 5 negatively worded items loading on different factors. IRT analysis of the 11 positively worded items showed that each was contributing meaningful information to the overall scores. The 11 positively worded items and the PSWQ-A produced the most reliable scores for levels of worry ranging from one θ below to two θ above the mean.

Conclusions

The 11 positively worded items of the PSWQ and the 8-item PSWQ-A were suitable for use in cancer patients while the full PSWQ was unsuitable due to inclusion of the negatively worded items. Future research should consider measuring worry when examining distress in cancer survivors.
Literatuur
1.
go back to reference American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders: DSM-IV-TR. Washington, DC: American Psychiatric Association. American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders: DSM-IV-TR. Washington, DC: American Psychiatric Association.
2.
go back to reference Andrews, G., et al. (2010). Generalized worry disorder: A review of DSM-IV generalized anxiety disorder and options for DSM-V. Depression and Anxiety, 27, 134.PubMedCrossRef Andrews, G., et al. (2010). Generalized worry disorder: A review of DSM-IV generalized anxiety disorder and options for DSM-V. Depression and Anxiety, 27, 134.PubMedCrossRef
3.
go back to reference Roemer, L., & Borkovec, T. D. (1994). Effects of suppressing thoughts about emotional material. Journal of Abnormal Psychology, 103, 467–474.PubMedCrossRef Roemer, L., & Borkovec, T. D. (1994). Effects of suppressing thoughts about emotional material. Journal of Abnormal Psychology, 103, 467–474.PubMedCrossRef
4.
go back to reference Woody, S. (1994). Generalized anxiety disorder (GAD) as an unsuccessful search for safety. Clinical Psychology Review, 14, 743.CrossRef Woody, S. (1994). Generalized anxiety disorder (GAD) as an unsuccessful search for safety. Clinical Psychology Review, 14, 743.CrossRef
5.
go back to reference Davey, G. C. L., & Tallis, F. (1994). Worrying: Perspectives on theory, assessment and treatment. New York: Wiley. Davey, G. C. L., & Tallis, F. (1994). Worrying: Perspectives on theory, assessment and treatment. New York: Wiley.
6.
go back to reference Hoyer, J., Gloster, A. T., & Herzberg, P. Y. (2009). Is worry different from rumination? Yes, it is more predictive of psychopathology! GMS Psycho-Social-Medicine, 6, 1–9. Hoyer, J., Gloster, A. T., & Herzberg, P. Y. (2009). Is worry different from rumination? Yes, it is more predictive of psychopathology! GMS Psycho-Social-Medicine, 6, 1–9.
7.
go back to reference Muris, P., Roelofs, J., Rassin, E., Franken, I., & Mayer, B. (2005). Mediating effects of rumination and worry on the links between neuroticism, anxiety and depression. Personality and Individual Differences, 39, 1105–1111.CrossRef Muris, P., Roelofs, J., Rassin, E., Franken, I., & Mayer, B. (2005). Mediating effects of rumination and worry on the links between neuroticism, anxiety and depression. Personality and Individual Differences, 39, 1105–1111.CrossRef
8.
go back to reference Borkovec, T. D., & Hu, S. (1990). The effect of worry on cardiovascular response to phobic imagery. Behaviour Research and Therapy, 28, 69–73.PubMedCrossRef Borkovec, T. D., & Hu, S. (1990). The effect of worry on cardiovascular response to phobic imagery. Behaviour Research and Therapy, 28, 69–73.PubMedCrossRef
9.
go back to reference Foa, E. B., & Kozak, M. J. (1986). Emotional processing of fear: Exposure to corrective information. Psychological Bulletin, 99, 20–35.PubMedCrossRef Foa, E. B., & Kozak, M. J. (1986). Emotional processing of fear: Exposure to corrective information. Psychological Bulletin, 99, 20–35.PubMedCrossRef
10.
go back to reference Kreibig, S. D. (2010). Autonomic nervous system activity in emotion: A review. Biological Psychology, 84, 394–421.PubMedCrossRef Kreibig, S. D. (2010). Autonomic nervous system activity in emotion: A review. Biological Psychology, 84, 394–421.PubMedCrossRef
11.
go back to reference Segerstrom, S. C., Glover, D. A., Craske, M. G., & Fahey, J. L. (1999). Worry affects the immune response to phobic fear. Brain, Behavior, and Immunity, 13, 80–92.PubMedCrossRef Segerstrom, S. C., Glover, D. A., Craske, M. G., & Fahey, J. L. (1999). Worry affects the immune response to phobic fear. Brain, Behavior, and Immunity, 13, 80–92.PubMedCrossRef
12.
go back to reference Zoccola, P. M., Dickerson, S. S., & Yim, I. S. (2011). Trait and state perseverative cognition and the cortisol awakening response. Psychoneuroendocrinology, 36, 592–595.PubMedCrossRef Zoccola, P. M., Dickerson, S. S., & Yim, I. S. (2011). Trait and state perseverative cognition and the cortisol awakening response. Psychoneuroendocrinology, 36, 592–595.PubMedCrossRef
13.
go back to reference Segerstrom, S. C., Schipper, L. J., & Greenberg, R. N. (2008). Caregiving, repetitive thought, and immune response to vaccination in older adults. Brain, Behavior, and Immunity, 22, 744–752.PubMedCrossRef Segerstrom, S. C., Schipper, L. J., & Greenberg, R. N. (2008). Caregiving, repetitive thought, and immune response to vaccination in older adults. Brain, Behavior, and Immunity, 22, 744–752.PubMedCrossRef
14.
go back to reference Sarenmalm, E. K., Ohlen, J., Jonsson, T., & Gaston-Johansson, F. (2007). Coping with recurrent breast cancer: Predictors of distressing symptoms and health-related quality of life. Journal of Pain and Symptom Management, 34, 24–39.CrossRef Sarenmalm, E. K., Ohlen, J., Jonsson, T., & Gaston-Johansson, F. (2007). Coping with recurrent breast cancer: Predictors of distressing symptoms and health-related quality of life. Journal of Pain and Symptom Management, 34, 24–39.CrossRef
15.
go back to reference Schag, C. A. C., et al. (1993). Characteristics of women at risk for psychosocial distress in the year after breast-cancer. Journal of Clinical Oncology, 11, 783–793.PubMed Schag, C. A. C., et al. (1993). Characteristics of women at risk for psychosocial distress in the year after breast-cancer. Journal of Clinical Oncology, 11, 783–793.PubMed
16.
go back to reference Mathews, A. (1990). Why worry? The cognitive function of anxiety. Behaviour Research and Therapy, 28, 455.PubMedCrossRef Mathews, A. (1990). Why worry? The cognitive function of anxiety. Behaviour Research and Therapy, 28, 455.PubMedCrossRef
17.
go back to reference Shapiro, S. L., et al. (2001). Quality of life and breast cancer: Relationship to psychosocial variables. Journal of Clinical Psychology, 57, 501–519.PubMedCrossRef Shapiro, S. L., et al. (2001). Quality of life and breast cancer: Relationship to psychosocial variables. Journal of Clinical Psychology, 57, 501–519.PubMedCrossRef
18.
go back to reference Lehto, R. H., & Cimprich, B. (2009). Worry and the formation of cognitive representations of illness in individuals undergoing surgery for suspected lung cancer. Cancer Nursing, 32, 2–10.PubMedCrossRef Lehto, R. H., & Cimprich, B. (2009). Worry and the formation of cognitive representations of illness in individuals undergoing surgery for suspected lung cancer. Cancer Nursing, 32, 2–10.PubMedCrossRef
19.
go back to reference Janz, N. K., et al. (2011). Correlates of worry about recurrence in a multiethnic population-based sample of women with breast cancer. Cancer, 117, 1827–1836.PubMedCrossRef Janz, N. K., et al. (2011). Correlates of worry about recurrence in a multiethnic population-based sample of women with breast cancer. Cancer, 117, 1827–1836.PubMedCrossRef
20.
go back to reference Hirai, K., et al. (2008). Discrimination between worry and anxiety among cancer patients: development of a Brief Cancer-Related Worry Inventory. Psychooncology, 17, 1172–1179.PubMedCrossRef Hirai, K., et al. (2008). Discrimination between worry and anxiety among cancer patients: development of a Brief Cancer-Related Worry Inventory. Psychooncology, 17, 1172–1179.PubMedCrossRef
21.
go back to reference Costanzo, E. S., et al. (2007). Adjusting to life after treatment: Distress and quality of life following treatment for breast cancer. British Journal of Cancer, 97, 1625–1631.PubMedCrossRef Costanzo, E. S., et al. (2007). Adjusting to life after treatment: Distress and quality of life following treatment for breast cancer. British Journal of Cancer, 97, 1625–1631.PubMedCrossRef
22.
go back to reference Kleiboer, A., et al. (2011). The problems reported by cancer patients with major depression. Psycho-Oncology, 20, 62–68.PubMedCrossRef Kleiboer, A., et al. (2011). The problems reported by cancer patients with major depression. Psycho-Oncology, 20, 62–68.PubMedCrossRef
23.
go back to reference Sarna, L. (1993). Women with lung-cancer: Impact on quality-of-life. Quality of Life Research, 2, 13–22.PubMedCrossRef Sarna, L. (1993). Women with lung-cancer: Impact on quality-of-life. Quality of Life Research, 2, 13–22.PubMedCrossRef
24.
go back to reference Ashing-Giwa, K. T., et al. (2004). Understanding the breast cancer experience of women: A qualitative study of African American, Asian American, Latina and Caucasian cancer survivors. Psycho-Oncology, 13, 408–428.PubMedCrossRef Ashing-Giwa, K. T., et al. (2004). Understanding the breast cancer experience of women: A qualitative study of African American, Asian American, Latina and Caucasian cancer survivors. Psycho-Oncology, 13, 408–428.PubMedCrossRef
25.
go back to reference Booth, K., Beaver, K., Kitchener, H., O’Neill, J., & Farrell, C. (2005). Women’s experiences of information, psychological distress and worry after treatment for gynaecological cancer. Patient Education and Counseling, 56, 225–232.PubMedCrossRef Booth, K., Beaver, K., Kitchener, H., O’Neill, J., & Farrell, C. (2005). Women’s experiences of information, psychological distress and worry after treatment for gynaecological cancer. Patient Education and Counseling, 56, 225–232.PubMedCrossRef
26.
go back to reference Hopko, D. R., et al. (2003). Assessing worry in older adults: Confirmatory factor analysis of the Penn State Worry Questionnaire and psychometric properties of an abbreviated model. Psychological Assessment, 15, 173–183.PubMedCrossRef Hopko, D. R., et al. (2003). Assessing worry in older adults: Confirmatory factor analysis of the Penn State Worry Questionnaire and psychometric properties of an abbreviated model. Psychological Assessment, 15, 173–183.PubMedCrossRef
27.
go back to reference Startup, H. M., & Erickson, T. M. (2006). The Penn State Worry Questionnaire (PSWQ). In G. C. L. Davey & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 101–119). New York, NY: Wiley. Startup, H. M., & Erickson, T. M. (2006). The Penn State Worry Questionnaire (PSWQ). In G. C. L. Davey & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 101–119). New York, NY: Wiley.
28.
go back to reference Olatunji, B. O., Schottenbauer, M. A., Rodriguez, B. F., Glass, C. R., & Arnkoff, D. B. (2007). The structure of worry: Relations between positive/negative personality characteristics and the Penn State Worry Questionnaire. Journal of Anxiety Disorders, 21, 540–553.PubMedCrossRef Olatunji, B. O., Schottenbauer, M. A., Rodriguez, B. F., Glass, C. R., & Arnkoff, D. B. (2007). The structure of worry: Relations between positive/negative personality characteristics and the Penn State Worry Questionnaire. Journal of Anxiety Disorders, 21, 540–553.PubMedCrossRef
29.
go back to reference Yilmaz, A. E., Gencoz, T., & Wells, A. (2008). Psychometric characteristics of the Penn State Worry Questionnaire and Metacognitions Questionnaire-30 and metacognitive predictors of worry and obsessive–compulsive symptoms in a Turkish sample. Clinical Psychology and Psychotherapy, 15, 424–439.PubMedCrossRef Yilmaz, A. E., Gencoz, T., & Wells, A. (2008). Psychometric characteristics of the Penn State Worry Questionnaire and Metacognitions Questionnaire-30 and metacognitive predictors of worry and obsessive–compulsive symptoms in a Turkish sample. Clinical Psychology and Psychotherapy, 15, 424–439.PubMedCrossRef
30.
go back to reference Zhong, J., Wang, C., Li, J., & Liu, J. (2009). Penn State Worry Questionnaire: Structure and psychometric properties of the Chinese version. Journal of Zhejiang University Science B, 10, 211.PubMedCrossRef Zhong, J., Wang, C., Li, J., & Liu, J. (2009). Penn State Worry Questionnaire: Structure and psychometric properties of the Chinese version. Journal of Zhejiang University Science B, 10, 211.PubMedCrossRef
31.
go back to reference Brown, T. A. (2003). Confirmatory factor analysis of the Penn State Worry Questionnaire: Multiple factors or method effects? Behaviour Research and Therapy, 41, 1411–1426.PubMedCrossRef Brown, T. A. (2003). Confirmatory factor analysis of the Penn State Worry Questionnaire: Multiple factors or method effects? Behaviour Research and Therapy, 41, 1411–1426.PubMedCrossRef
32.
go back to reference Fresco, D. M., Mennin, D. S., Heimberg, R. G., & Turk, C. L. (2003). Using the Penn State Worry Questionnaire to identify individuals with generalized anxiety disorder: A receiver operating characteristic analysis. Journal of Behavior Therapy and Experimental Psychiatry, 34, 283–291.PubMedCrossRef Fresco, D. M., Mennin, D. S., Heimberg, R. G., & Turk, C. L. (2003). Using the Penn State Worry Questionnaire to identify individuals with generalized anxiety disorder: A receiver operating characteristic analysis. Journal of Behavior Therapy and Experimental Psychiatry, 34, 283–291.PubMedCrossRef
33.
go back to reference Meyer, T. J., Miller, M. L., Metzger, R. L., & Borkovec, T. D. (1990). Development and validation of the Penn State Worry Questionnaire. Behaviour Research and Therapy, 28, 487–495.PubMedCrossRef Meyer, T. J., Miller, M. L., Metzger, R. L., & Borkovec, T. D. (1990). Development and validation of the Penn State Worry Questionnaire. Behaviour Research and Therapy, 28, 487–495.PubMedCrossRef
34.
go back to reference Wirth, R. J., & Edwards, M. C. (2007). Item factor analysis: Current approaches and future directions. Psychological Methods, 12, 58–79.PubMedCrossRef Wirth, R. J., & Edwards, M. C. (2007). Item factor analysis: Current approaches and future directions. Psychological Methods, 12, 58–79.PubMedCrossRef
35.
go back to reference Gracious, B. L., et al. (2010). Prevalence of overweight and obesity in adolescents with severe mental Illness: A cross-sectional chart review. Journal of Clinical Psychiatry, 71, 949–954.PubMedCrossRef Gracious, B. L., et al. (2010). Prevalence of overweight and obesity in adolescents with severe mental Illness: A cross-sectional chart review. Journal of Clinical Psychiatry, 71, 949–954.PubMedCrossRef
36.
go back to reference McGrath, R. E., Pogge, D. L., & Stokes, J. M. (2002). Incremental validity of selected MMPI: A content scales in an inpatient setting. Psychological Assessment, 14, 401–409.PubMedCrossRef McGrath, R. E., Pogge, D. L., & Stokes, J. M. (2002). Incremental validity of selected MMPI: A content scales in an inpatient setting. Psychological Assessment, 14, 401–409.PubMedCrossRef
37.
go back to reference Webb, S. A., et al. (2008). Comparison of self-report measures for identifying late-life generalized anxiety in primary care. Journal of Geriatric Psychiatry and Neurology, 21, 223–231.PubMed Webb, S. A., et al. (2008). Comparison of self-report measures for identifying late-life generalized anxiety in primary care. Journal of Geriatric Psychiatry and Neurology, 21, 223–231.PubMed
38.
go back to reference Behar, E., Alcaine, O., Zuellig, A. R., & Borkovec, T. D. (2003). Screening for generalized anxiety disorder using the Penn State Worry Questionnaire: A receiver operating characteristic analysis. Journal of Behavior Therapy and Experimental Psychiatry, 34, 25–43.PubMedCrossRef Behar, E., Alcaine, O., Zuellig, A. R., & Borkovec, T. D. (2003). Screening for generalized anxiety disorder using the Penn State Worry Questionnaire: A receiver operating characteristic analysis. Journal of Behavior Therapy and Experimental Psychiatry, 34, 25–43.PubMedCrossRef
39.
go back to reference Jöreskog, K. G., & Sörbom, D. (2006). LISREL 8.80. Lincolnwood, IL: Scientific Software International, Inc. Jöreskog, K. G., & Sörbom, D. (2006). LISREL 8.80. Lincolnwood, IL: Scientific Software International, Inc.
40.
go back to reference Hu, L. -T., & Bentler, P. M. (1998). Fit indices in covariance structure modeling: Sensitivity to underparameterized model misspecification. Psychological Methods, 3, 424–453.CrossRef Hu, L. -T., & Bentler, P. M. (1998). Fit indices in covariance structure modeling: Sensitivity to underparameterized model misspecification. Psychological Methods, 3, 424–453.CrossRef
41.
go back to reference MacCallum, R. C., Browne, M. W., & Sugawara, H. M. (1996). Power analysis and determination of sample size for covariance structure modeling. Psychological Methods, 1, 130–149.CrossRef MacCallum, R. C., Browne, M. W., & Sugawara, H. M. (1996). Power analysis and determination of sample size for covariance structure modeling. Psychological Methods, 1, 130–149.CrossRef
42.
go back to reference Bentler, P. M. (1990). Quantitative methods in psychology: Comparative fit indexes in structural models. Psychological Bulletin, 107, 238–246.PubMedCrossRef Bentler, P. M. (1990). Quantitative methods in psychology: Comparative fit indexes in structural models. Psychological Bulletin, 107, 238–246.PubMedCrossRef
43.
go back to reference Samejima, F. (1997). Graded response model. In W. J. van der Linden & R. Hambleton (Eds.) Handbook of modern item response theory. New York: Springer. Samejima, F. (1997). Graded response model. In W. J. van der Linden & R. Hambleton (Eds.) Handbook of modern item response theory. New York: Springer.
44.
go back to reference Reckase, M. D. (1997). The past and future of multidimensional item response theory. Applied Psychological Measurement, 21, 85–100.CrossRef Reckase, M. D. (1997). The past and future of multidimensional item response theory. Applied Psychological Measurement, 21, 85–100.CrossRef
45.
go back to reference Hays, R. D., Morales, L. S., & Reise, S. P. (2000). Item response theory and health outcomes measurement in the 21st century. Medical Care Online, 38, II28–II42. Hays, R. D., Morales, L. S., & Reise, S. P. (2000). Item response theory and health outcomes measurement in the 21st century. Medical Care Online, 38, II28–II42.
46.
go back to reference Crittendon, J., & Hopko, D. R. (2006). Assessing worry in older and younger adults: Psychometric properties of an abbreviated Penn State Worry Questionnaire (PSWQ-A). Journal of Anxiety Disorders, 20, 1036–1054.PubMedCrossRef Crittendon, J., & Hopko, D. R. (2006). Assessing worry in older and younger adults: Psychometric properties of an abbreviated Penn State Worry Questionnaire (PSWQ-A). Journal of Anxiety Disorders, 20, 1036–1054.PubMedCrossRef
47.
go back to reference Hazlett-Stevens, H., Ullman, J. B., & Craske, M. G. (2004). Factor structure of the Penn State Worry Questionnaire: Examination of a method factor. Assessment, 11, 361–370.PubMedCrossRef Hazlett-Stevens, H., Ullman, J. B., & Craske, M. G. (2004). Factor structure of the Penn State Worry Questionnaire: Examination of a method factor. Assessment, 11, 361–370.PubMedCrossRef
48.
go back to reference Thissen, D. (1991). MULTILOG user’s guide—Version 6. Chicago, IL: Scientific Software, Inc. Thissen, D. (1991). MULTILOG user’s guide—Version 6. Chicago, IL: Scientific Software, Inc.
49.
go back to reference Rodebaugh, T. L., Woods, C. M., & Heimberg, R. G. (2007). The reverse of social anxiety is not always the opposite: The reverse-scored items of the Social Interaction Anxiety Scale do not belong. Behavior Therapy, 38, 192–206.PubMedCrossRef Rodebaugh, T. L., Woods, C. M., & Heimberg, R. G. (2007). The reverse of social anxiety is not always the opposite: The reverse-scored items of the Social Interaction Anxiety Scale do not belong. Behavior Therapy, 38, 192–206.PubMedCrossRef
50.
go back to reference Conrad, K. J., et al. (2004). Comparing traditional and Rasch analyses of the Mississippi PTSD scale: revealing limitations of reverse-scored items. Journal of Applied Measurement, 5, 1–16. Conrad, K. J., et al. (2004). Comparing traditional and Rasch analyses of the Mississippi PTSD scale: revealing limitations of reverse-scored items. Journal of Applied Measurement, 5, 1–16.
51.
go back to reference Carlson, M., et al. (2011). Psychometric properties of reverse-scored items on the CES-D in a sample of ethnically diverse older adults. Psychological Assessment, 23, 558–562.PubMedCrossRef Carlson, M., et al. (2011). Psychometric properties of reverse-scored items on the CES-D in a sample of ethnically diverse older adults. Psychological Assessment, 23, 558–562.PubMedCrossRef
52.
go back to reference Carlson, L. E., & Bultz, B. D. (2003). Cancer distress screening. Journal of Psychosomatic Research, 55, 403–409.PubMedCrossRef Carlson, L. E., & Bultz, B. D. (2003). Cancer distress screening. Journal of Psychosomatic Research, 55, 403–409.PubMedCrossRef
53.
go back to reference Lampic, C., et al. (1994). Anxiety and cancer-related worry of cancer-patients at routine follow-up visits. Acta Oncologica, 33, 119–125.PubMedCrossRef Lampic, C., et al. (1994). Anxiety and cancer-related worry of cancer-patients at routine follow-up visits. Acta Oncologica, 33, 119–125.PubMedCrossRef
54.
go back to reference Lee-Jones, C., Humphris, G. M., Dixon, R., & Hatcher, M. B. (1997). Fear of cancer recurrence: A literature review and proposed cognitive formulation to explain exacerbation of recurrence fears. Psychooncology, 6, 95–105.PubMedCrossRef Lee-Jones, C., Humphris, G. M., Dixon, R., & Hatcher, M. B. (1997). Fear of cancer recurrence: A literature review and proposed cognitive formulation to explain exacerbation of recurrence fears. Psychooncology, 6, 95–105.PubMedCrossRef
55.
go back to reference Golden-Kreutz, D. M., et al. (2005). Traumatic stress, perceived global stress, and life events: Prospectively predicting quality of life in breast cancer patients. Health Psychology, 24, 288–296.PubMedCrossRef Golden-Kreutz, D. M., et al. (2005). Traumatic stress, perceived global stress, and life events: Prospectively predicting quality of life in breast cancer patients. Health Psychology, 24, 288–296.PubMedCrossRef
56.
go back to reference First, M. B., Spitzer, R. L., Gibbon, M., & Williams, J. B. W. (2002). Structured clinical interview for DSM-IV Axis I disorders, research version, non-patient edition (SCID-I/NP). New York: Biometrics Research, New York State Psychiatric Institute. First, M. B., Spitzer, R. L., Gibbon, M., & Williams, J. B. W. (2002). Structured clinical interview for DSM-IV Axis I disorders, research version, non-patient edition (SCID-I/NP). New York: Biometrics Research, New York State Psychiatric Institute.
57.
go back to reference Kessler, R. C., et al. (2005). Lifetime prevalence and age-of-onset distributions of DSM-IV disorders in the National Comorbidity Survey Replication. Archives of General Psychiatry, 62, 593–602.PubMedCrossRef Kessler, R. C., et al. (2005). Lifetime prevalence and age-of-onset distributions of DSM-IV disorders in the National Comorbidity Survey Replication. Archives of General Psychiatry, 62, 593–602.PubMedCrossRef
Metagegevens
Titel
Factor analytic and item response theory evaluation of the Penn State Worry Questionnaire in women with cancer
Auteurs
Salene M. Wu
Tammy A. Schuler
Michael C. Edwards
Hae-Chung Yang
Brittany M. Brothers
Publicatiedatum
01-08-2013
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 6/2013
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-012-0253-0

Andere artikelen Uitgave 6/2013

Quality of Life Research 6/2013 Naar de uitgave