Table 1.
Most common co-morbidities in cohort with rheumatoid arthritis (N = 62,681, all ages)*
| Condition (ICD-9 code) | Number of persons | Percent |
|---|---|---|
| 4019 Hypertension NOS | 12,773 | 20.4% |
| 4011 Benign hypertension | 12,482 | 19.9% |
| 78650 Chest pain NOS | 8,742 | 13.9% |
| 2724 Hyperlipidemia NEC/NOS | 8,690 | 13.9% |
| 25000 Diabetes Mellitus II without complication | 7,504 | 12.0% |
| 78079 Malaise & fatigue NEC | 6,046 | 9.6% |
| 5990 Urinary tract infection NOS | 5,965 | 9.5% |
| 78900 Abdominal pain unspecified site | 5,712 | 9.1% |
| 7862 Cough | 5,649 | 9.0% |
| 2449 Hypothyroidism NOS | 5,524 | 8.8% |
| 78605 Shortness of breath | 5,516 | 8.8% |
| 4660 Acute bronchitis | 5,400 | 8.6% |
| 2720 Pure hypercholesterolemia | 5,046 | 8.1% |
| 4619 Acute sinusitis NOS | 4,833 | 7.7% |
| 2859 Anemia NOS | 4,632 | 7.4% |
| 73300 Osteoporosis NOS | 4,529 | 7.2% |
| 41401 Coronary atherosclerosis native vessel | 4,325 | 6.9% |
| 53081 Esophageal reflux | 4,288 | 6.8% |
| 7020 Actinic keratosis | 4,249 | 6.8% |
| 73390 Bone & cartilage disease NOS | 4,113 | 6.6% |
| 4659 Acute upper respiratory infection NOS | 4,112 | 6.6% |
| 496 Chronic airway obstruct NEC | 4,041 | 6.4% |
| 36616 Senile nuclear cataract | 3,914 | 6.2% |
| 78609 Respiratory abnormality NEC | 3,605 | 5.8% |
| 7840 Headache | 3,246 | 5.2% |
| 41400 Coronary atherosclerosis unspec. vessel | 3,002 | 4.8% |
* Excluded arthritis/RA-related codes ICD 710-729; 996.4.
NOS: Not otherwise specified NEC: Not elsewhere classified