Table 2 Top 3 International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) diagnoses for primary Clinical Classifications Software (CCS) categories identified in cluster analysis
CCS category | Top 3 ICD-9-CM diagnoses (%) | ||
|---|---|---|---|
Adjustment disorders | Unspecified adjustment reaction (25.7) | Adjustment disorder with mixed anxiety and depressed mood (24.4) | Adjustment disorder with anxiety (23.8) |
Anxiety disorders | Posttraumatic stress disorder (62.5) | Anxiety state, unspecified (26.1) | Other acute reactions to stress (5.8) |
Back problem | Lumbago (43.4) | Cervicalgia (18.1) | Pain in thoracic spine (13.0) |
Headache/migraine | Headache (35.2) | Other headache syndromes (30.1) | Posttraumatic headache, unspecified (10.7) |
Intracranial injury | Late effect of intracranial injury without mention of skull fracture (41.8) | Intracranial injury of other and unspecified nature (24.9) | Concussion with loss of consciousness of 30 min or less (6.5) |
Open wound extremity | Traumatic amputation of leg, unilateral, below knee (10.1) | Traumatic amputation of leg, unilateral, at or above knee (9.0) | Traumatic amputation of leg, bilateral (7.2) |
Open wound head, neck, trunk | Open wound, multiple sites (17.1) | Open wound of buttock (10.3) | Open wound of ear drum (7.5) |
Other connective tissue | Muscle weakness (37.3) | Pain in limb (29.1) | Myalgia and myositis (4.7) |
Other joint disorder | Difficulty in walking (17.3) | Pain in joint, lower leg (16.1) | Pain in joint, ankle and foot (13.0) |
Other nerve disorder | Abnormality of gait (44.9) | Lesion of ulnar nerve (4.3) | Other chronic pain (4.0) |
Other injury | Posttraumatic wound infection (14.2) | Other specified sites, including multiple injury (11.3) | Head injury, unspecified (9.0%) |