Alexopoulos, GS, Buckwalter, K, Olin, J, Martinez, R, Wainscott, C, Krishnan, KR (2002). Comorbidity of late life depression: an opportunity for research on mechanisms and treatment. Biological Psychiatry
Andreescu, C, Lenze, EJ, Dew, MA, Begley, AE, Mulsant, BH, Dombrovski, AY, Pollock, BG, Stack, J, Miller, MD, Reynolds, CF (2007). Effect of comorbid anxiety on treatment response and relapse risk in late-life depression: controlled study. British Journal of Psychiatry
Armstrong, MJ, Gruber-Baldini, AL, Reich, SG, Fishman, PS, Lachner, C, Shulman, LM (2014). Which features of Parkinson's disease predict earlier exit from the workforce?
Parkinsonism and Related Disorders
Berg, D, Lang, AE, Postuma, RB, Maetzler, W, Deuschl, G, Gasser, T, Siderowf, A, Schapira, AH, Oertel, W, Obeso, JA, Olanow, CW, Poewe, W, Stern, M (2013). Changing the research criteria for the diagnosis of Parkinson's disease: obstacles and opportunities. Lancet Neurology
Berg, D, Postuma, RB, Bloem, B, Chan, P, Dubois, B, Gasser, T, Goetz, CG, Halliday, GM, Hardy, J, Lang, AE, Litvan, I, Marek, K, Obeso, J, Oertel, W, Olanow, CW, Poewe, W, Stern, M, Deuschl, G (2014). Time to redefine PD? Introductory statement of the MDS Task Force on the definition of Parkinson's disease. Movement Disorders
Brown, RG, Landau, S, Hindle, JV, Playfer, J, Samuel, M, Wilson, KC, Hurt, CS, Anderson, RJ, Carnell, J, Dickinson, L, Gibson, G, van, SR, Sellwood, K, Thomas, BA, Burn, DJ (2011). Depression and anxiety related subtypes in Parkinson's disease. Journal of Neurology Neurosurgery and Psychiatry
Burn, DJ, Landau, S, Hindle, JV, Samuel, M, Wilson, KC, Hurt, CS, Brown, RG (2012). Parkinson's disease motor subtypes and mood. Movement Disorders
Chen, JJ, Marsh, L (2014). Anxiety in Parkinson's disease: identification and management. Therapeutic Advances in Neurological Disorders
Cohen, A, Gilman, SE, Houck, PR, Szanto, K, Reynolds, CF III (2009). Socioeconomic status and anxiety as predictors of antidepressant treatment response and suicidal ideation in older adults. Social Psychiatry and Psychiatric Epidemiology
Collins, LM, Lanza, ST (2010). Latent Class and Latent Transition Analysis with Applications in the Social, Behavioral and Health Sciences. John Wiley & Sons, Inc.: Hoboken, NJ.
Copeland, JR, Kelleher, MJ, Kellett, JM, Gourlay, AJ, Gurland, BJ, Fleiss, JL, Sharpe, L (1976). A semi-structured clinical interview for the assessment of diagnosis and mental state in the elderly: the Geriatric Mental State Schedule. I. Development and reliability. Psychological Medicine
Deane, KH, Flaherty, H, Daley, DJ, Pascoe, R, Penhale, B, Clarke, CE, Sackley, C, Storey, S (2014). Priority setting partnership to identify the top 10 research priorities for the management of Parkinson's disease. BMJ Open
Dissanayaka, NN, Sellbach, A, Matheson, S, O'Sullivan, JD, Silburn, PA, Byrne, GJ, Marsh, R, Mellick, GD (2010). Anxiety disorders in Parkinson's disease: prevalence and risk factors. Movement Disorders
Dobkin, RD, Menza, M, Allen, LA, Gara, MA, Mark, MH, Tiu, J, Bienfait, KL, Friedman, J (2011). Cognitive-behavioral therapy for depression in Parkinson's disease: a randomized, controlled trial. American Journal of Psychiatry
Dobkin, RD, Rubino, JT, Friedman, J, Allen, LA, Gara, MA, Menza, M (2013). Barriers to mental health care utilization in Parkinson's disease. Journal of Geriatric Psychiatry and Neurology
Duncan, GW, Khoo, TK, Yarnall, AJ, O'Brien, JT, Coleman, SY, Brooks, DJ, Barker, RA, Burn, DJ (2014). Health-related quality of life in early Parkinson's disease: the impact of nonmotor symptoms. Movement Disorders
Evans, D, Norman, P (2009). Illness representations, coping and psychological adjustment to Parkinson's disease. Psychology and Health
Fahn, S, Elton, RL, members of the UPDRS development committee (1987). Unified Parkinson's Disease Rating Scale. In Recent Developments in Parkinson's Disease (ed. Fahn, S., Marsden, C. D. and Calne, D. B.), pp. 153–164. Macmillan Health Care Information: Florham Park, NJ.
Fava, M, Rush, AJ, Alpert, JE, Balasubramani, GK, Wisniewski, SR, Carmin, CN, Biggs, MM, Zisook, S, Leuchter, A, Howland, R, Warden, D, Trivedi, MH (2008). Difference in treatment outcome in outpatients with anxious versus nonanxious depression: a STAR*D report. American Journal of Psychiatry
Gison, A, Dall'Armi, V, Donati, V, Rizza, F, Giaquinto S Irccs San Raffaele Pisana Rome Italy (2014). Dispositional optimism, depression, disability and quality of life in Parkinson's disease. Functional Neurology
Graham, JW, Collins, LM, Wugalter, SE, Chung, NK, Hansen, WB (1991). Modeling transitions in latent stage-sequential processes: a substance use prevention example. Journal of Consulting and Clinical Psychology
Hamilton, M (1960). A rating scale for depression. Journal of Neurology Neurosurgery and Psychiatry
Hoehn, MM, Yahr, MD (1967). Parkinsonism: onset progression and mortality. Neurology
Hughes, TA, Ross, HF, Mindham, RH, Spokes, EG (2004). Mortality in Parkinson's disease and its association with dementia and depression. Acta Neurologica Scandinavica
Hurt, CS, Burn, DJ, Hindle, J, Samuel, M, Wilson, K, Brown, RG (2013). Thinking positively about chronic illness: an exploration of optimism, illness perceptions and well-being in patients with Parkinson's disease. British Journal of Health Psychology
Hurt, CS, Landau, S, Burn, DJ, Hindle, JV, Samuel, M, Wilson, K, Brown, RG (2012). Cognition, coping, and outcome in Parkinson's disease. International Psychogeriatrics
Hurt, CS, Thomas, BA, Burn, DJ, Hindle, JV, Landau, S, Samuel, M, Wilson, KC, Brown, RG (2011). Coping in Parkinson's disease: an examination of the coping inventory for stressful situations. International Journal of Geriatric Psychiatry
Jankovic, J, McDermott, M, Carter, J, Gauthier, S, Goetz, C, Golbe, L, Huber, S, Koller, W, Olanow, C, Shoulson, I (1990). Variable expression of Parkinson's disease: a base-line analysis of the DATATOP cohort. The Parkinson Study Group. Neurology
Lamers, F, Rhebergen, D, Merikangas, KR, de, JP, Beekman, AT, Penninx, BW (2012). Stability and transitions of depressive subtypes over a 2-year follow-up. Psychological Medicine
Lewis, SJG, Foltynie, T, Blackwell, AD, Robbins, TW, Owen, AM, Barker, RA (2005). Heterogeneity of Parkinson's disease in the early clinical stages using a data driven approach. Journal of Neurology Neurosurgery and Psychiatry
Menza, M, Dobkin, RD, Marin, H, Mark, MH, Gara, M, Buyske, S, Bienfait, K, Dicke, A (2009). A controlled trial of antidepressants in patients with Parkinson disease and depression. Neurology
Menza, MA, Robertson, HD, Bonapace, AS (1993). Parkinson's disease and anxiety: comorbidity with depression. Biological Psychiatry
Michl, LC, McLaughlin, KA, Shepherd, K, Nolen-Hoeksema, S (2013). Rumination as a mechanism linking stressful life events to symptoms of depression and anxiety: longitudinal evidence in early adolescents and adults. Journal of Abnormal Psychology
Mioshi, E, Dawson, K, Mitchell, J, Arnold, R, Hodges, JR (2006). The Addenbrooke's Cognitive Examination Revised (ACE-R): a brief cognitive test battery for dementia screening. International Journal of Geriatric Psychiatry
Moonen, AJ, Wijers, A, Leentjens, AF, Christine, CW, Factor, SA, Juncos, J, Lyness, JM, Marsh, L, Panisset, M, Pfeiffer, R, Rottenberg, D, Serrano, RC, Shulman, L, Singer, C, Slevin, J, McDonald, W, Auinger, P, Richard, IH (2014). Severity of depression and anxiety are predictors of response to antidepressant treatment in Parkinson's disease. Parkinsonism and Related Disorders
Muthen, LK, Muthen, BO (2007). Mplus User's Guide. Muthen and Muthen: Los Angeles, CA.
Negre-Pages, L, Grandjean, H, Lapeyre-Mestre, M, Montastruc, JL, Fourrier, A, Lepine, JP, Rascol, O (2010). Anxious and depressive symptoms in Parkinson's disease: the French cross-sectionnal DoPaMiP study. Movement Disorders
Nuti, A, Ceravolo, R, Piccinni, A, Dell'Agnello, G, Bellini, G, Gambaccini, G, Rossi, C, Logi, C, Dell'Osso, L, Bonuccelli, U (2004). Psychiatric comorbidity in a population of Parkinson's disease patients. European Journal of Neurology
Office for National Statistics (2000). Standard Occupational Classification 2000. The Stationery Office: London.
Penninx, BW, Nolen, WA, Lamers, F, Zitman, FG, Smit, JH, Spinhoven, P, Cuijpers, P, de Jong, PJ, van Marwijk, HW, van der Meer, K, Verhaak, P, Laurant, MG, de, GR, Hoogendijk, WJ, van der Wee, N, Ormel, J, van, DR, Beekman, AT (2011). Two-year course of depressive and anxiety disorders: results from the Netherlands Study of Depression and Anxiety (NESDA). Journal of Affective Disorders
Prentice, R, Gloeckler, L (1978). Regression analysis of grouped survival data with application to breast cancer data. Biometrics
Qureshi, SU, Amspoker, AB, Calleo, JS, Kunik, ME, Marsh, L (2012). Anxiety disorders, physical illnesses, and health care utilization in older male veterans with Parkinson disease and comorbid depression. Journal of Geriatric Psychiatry and Neurology
Reijnders, JSAM, Ehrt, U, Weber, WEJ, Aarsland, D, Leentjens, AFG (2008). A systematic review of prevalence studies of depression in Parkinson's disease. Movement Disorders
Richard, IH, McDermott, MP, Kurlan, R, Lyness, JM, Como, PG, Pearson, N, Factor, SA, Juncos, J, Serrano, RC, Brodsky, M, Manning, C, Marsh, L, Shulman, L, Fernandez, HH, Black, KJ, Panisset, M, Christine, CW, Jiang, W, Singer, C, Horn, S, Pfeiffer, R, Rottenberg, D, Slevin, J, Elmer, L, Press, D, Hyson, HC, McDonald, W (2012). A randomized, double-blind, placebo-controlled trial of antidepressants in Parkinson disease. Neurology
Riedel, O, Dodel, R, Deuschl, G, Klotsche, J, Forstl, H, Heuser, I, Oertel, W, Reichmann, H, Riederer, P, Trenkwalder, C, Wittchen, HU (2012). Depression and care-dependency in Parkinson's disease: results from a nationwide study of 1449 outpatients. Parkinsonism and Related Disorders
Schrag, A, Jahanshahi, M, Quinn, N (2000). What contributes to quality of life in patients with Parkinson's disease?
J. Neurol. Neurosurg. Psychiatry
Schwab, RS, England, AC (1969). Projection technique for evaluating surgery for Parkinson's disease. In Third Symposium on Parkinson's Disease (ed. Gillingham, F. J. and Donaldson, M. C.), pp. 152–157. E&S Livingstone: Edinburgh.
Seppi, K, Weintraub, D, Coelho, M, Perez-Lloret, S, Fox, SH, Katzenschlager, R, Hametner, EM, Poewe, W, Rascol, O, Goetz, CG, Sampaio, C (2011). The movement disorder society evidence-based medicine review update: treatments for the non-motor symptoms of Parkinson's disease. Movement Disorders
26 (Suppl. 3), S42–S80.
Shulman, LM, Taback, RL, Rabinstein, AA, Weiner, WJ (2002). Non-recognition of depression and other non-motor symptoms in Parkinson's disease. Parkinsonism and Related Disorders
Silverman, MN, Deuster, PA (2014). Biological mechanisms underlying the role of physical fitness in health and resilience. Interface Focus
Starkstein, SE, Mayberg, HS, Leiguarda, R, Preziosi, TJ, Robinson, RG (1992). A prospective longitudinal study of depression, cognitive decline, and physical impairments in patients with Parkinson's disease. Journal of Neurology Neurosurgery and Psychiatry
StataCorp, LP (2009). Stata 11 Base Reference Manual. Stata Press: College Station, TX.
Tandberg, E, Larsen, JP, Aarsland, D, Cummings, JL (1996). The occurrence of depression in Parkinson's disease. A community-based study. Archives of Neurology
Tomlinson, CL, Stowe, R, Patel, S, Rick, C, Gray, R, Clarke, CE (2010). Systematic review of levodopa dose equivalency reporting in Parkinson's disease. Movement Disorders
Vu, TC, Nutt, JG, Holford, NH (2012). Progression of motor and nonmotor features of Parkinson's disease and their response to treatment. British Journal of Clinical Pharmacology
Weintraub, D, Moberg, PJ, Duda, JE, Katz, IR, Stern, MB (2003). Recognition and treatment of depression in Parkinson's disease. Journal of Geriatric Psychiatry and Neurology
Weintraub, D, Morales, KH, Moberg, PJ, Bilker, WB, Balderston, C, Duda, JE, Katz, IR, Stern, MB (2005). Antidepressant studies in Parkinson's disease: a review and meta-analysis. Movement Disorders
Whitelaw, NA, Liang, J (1991). The structure of the OARS physical health measures. Medical Care
Zigmond, AS, Snaith, RP (1983). The Hospital Anxiety and Depression Scale. Acta Psychiatrica Scandinavica