Table 3-3 -- Frequency Distribution of Major Diagnostic Categories
(ICD-9-CM) in Participants in DOD's CCEP and VA's Registry

                                                                    Registry  
                                             CCEP participants    participants                                             
                                                (N=18,075)         (N=52,216)      

                                                        Any of top   Any of   
Diagnostic categories                        Primary      seven     top three  
   (ICD-9-CM code)                          diagnosis   diagnoses   diagnoses  

Psychological conditions                      18.4%       36.0%       15.1%   

Musculoskeletal system diseases               18.3        47.2        25.3                                                           

Symptoms, signs, and ill-defined conditions   17.9        43.1        19.9 

Healthy                                        9.7        10.2         NA     

Respiratory system diseases                    6.8        17.5        14.4    

Digestive system diseases                      6.3        20.4        11.4    

Skin diseases                                  6.2        19.9        13.5    

Nervous system diseases                        5.7        17.8         8.3    

Infectious diseases                            2.6         9.0         7.1    

Circulatory system diseases                    2.2         8.0         7.1    

Endocrine disorders                            2.0         7.9          NA    

Genitourinary system diseases                  1.3         5.4         3.4    

Injury and poisoning                           0.8         3.2         4.8    

Neoplasms                                      0.8(0.3)a   2.9         0.4a
                                                                         
Blood and blood organ diseases                 0.5         3.0          NA                                                        



NA = Not available

a Malignant neoplasms (cancer) only.

SOURCES: U.S. Department of Defense, Comprehensive Clinical Evaluation Program for Persian Gulf War Veterans: CCEP Report on 18,598 Participants (Washington, DC: U.S. Department of Defense, 1996); and H.K. Kang, N.A. Dalager, and K.Y. Lee, "Health Surveillance of Persian Gulf War Veterans-A Review of the DVA Persian Gulf Registry Data," unpublished report, Department of Veterans Affairs, March 1996.