1. Parkerson GR Jr, Michener JL, Wu LR, Finch JN, Muhlbaier LH, Magruder-Habib K,
Kertesz JW, Clapp-Channing N, Morrow DS, Chen A L-T, Jokerst E. Associations
among family support, family stress, and personal functional health status. J Clin
Epidemiol 1989;42:217-229.

2. Parkerson GR Jr, Michener JL, Wu LR, et al. The effect of a telephone family
assessment intervention on the functional health of patients with elevated family stress.
Med Care 1989;27:680-693.

3. Parkerson GR Jr, Broadhead WE, Tse C-KJ. Quality of life and functional health of
primary care patients. J Clin Epidemiol 1992;45(11):1303-1313.

4. Parkerson GR Jr, Broadhead WE, Tse C-KJ. The Duke Severity of Illness Checklist
(DUSOI) for measurement of severity and comorbidity.J Clin Epidemiol 1993;46:379-
393.

5. Lahad A, Yodfat Y. Impact of comorbidity on well-being in hypertension: case control
study. J Human Hypertension 1993;7:611-614.

6. Parkerson GR Jr, Hammond WE, Yarnall KSH. Feasibility and potential clinical
usefulness of a computerized severity of illness measure. Arch Fam Med 1994;3:968-
973.

7. Parkerson GR Jr, Broadhead WE, Tse C-KJ. Perceived family stress as a predictor
of health-related outcomes. Arch Fam Med 1995;4:253-260.

8. Parkerson GR Jr, Broadhead WE, Tse C-KJ. Health status and severity of illness as
predictors of outcomes in primary care. Med Care 1995;33:53-66.

9. Parkerson, GR Jr, Bridges-Webb C, Gervas J, Hofmans-Okkes I, Lamberts,H,
Froom J, Fischer G, Meyboom-de Jong B, Bentsen B, Klinkman M, de Maeseneer J.
Classification of severity of health problems in family/general practice: an international
field trial. Fam Pract 1996;13:303-309.

10. Parkerson GR Jr, Broadhead WE, Tse C-KJ. Anxiety and depression symptom
identification using the Duke Health Profile. J Clin Epidemiol 1996;49:85-93.

11. Parkerson GR Jr, Broadhead WE. Screening for anxiety and depression in primary
care using the Duke Anxiety-Depression Scale (DUKE-AD). Fam Med 1997;29(3):177-181.

16. Schulberg HC, Block MR, Madonia MJ, Scott CP, Lave JR, Rodriguez E, Coulehan
JL. The 'usual care' of major depression in primary care practice. Arch Fam Med
1997;6:334-339.

17. Eccles M, Steen N, Hutchinson A, Bradshaw C, McColl E. Severity measurement
using a generic instrument: a feasibility study in ambulatory care involving patients with
diabetes or asthma. Eur J Publ Health 1997;7:205-209.

18. Shiels C, Eccles M, Hutchinson A, Gardiner E, Smoljanovic L. The inter-rater
reliability of a generic measure of severity of illness. Fam Pract 1997;14(6):466-471.

19. International Classification of Primary Care ICPC-2 (Second edition). WONCA
International Classification Committee. Oxford: Oxford University Press, 1998.

20. Parkerson GR Jr. User's Guide for Four Duke Health Measures: Duke Health Profile
(DUKE), Duke Severity of Illness Checklist (DUSOI), Duke Case-Mix System (DUMIX),
Duke Social Support and Stress Scale (DUSOCS). Durham, NC: Department of
Community and Family Medicine, Duke University Medical Center, 1998.

21. Leung K-K, Lue B-H, Lee M-B, Tang L-Y. Screening of depression in patients with
chronic medical diseases in a primary care setting. Fam Pract 1998;15(1):67-75.

22. Martínez C,Juncosa S, Roset M. ¿Está relacionada la gravedad con la utilización de recursos? Una exploración del Duke Severity Of Illness Scale (DUSOI). [Is the seriousness of illness related to resource use? An investigation with the Duke Severity Of Illness scale (DUSOI)]. Atención Primaria, 1998;22:285-292.