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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Pharmacoepidemiol Drug Saf. 2016 May 27;25(7):820–826. doi: 10.1002/pds.4044

Table 2.

Baseline Characteristics for patients identified by algorithms

Algorithm n Age, years (SD) Female,% Uric Acid, mg/dl (SD MSU documented,%
Medication
 ICD-9 + medication claim for any gout related medications* 503 75.4 (±7.7) 39 8.5 (±2.4) 10
 ICD-9 + medication claim for Colchicine** 302 76 (±7.8) 39 8.6 (±2.6) 15
 ICD-9 + medication claim for NSAID/Cox-2 selective inhibitor 174 74.5 (± 7.0) 39 7.8 (±1.7) 5
 ICD-9 + medication claim for oral Glucocorticoids 270 75.4 (±7.7) 36 8.7 (±2.6) 13
Outpatient
 ICD-9 + medication claim for any gout related medications* 75 70.1 (±11.1) 40 7.4 (±2.1) 6
Procedure
 ICD-9 + CPT or J code within 7 days 290 76.3 (±7.6) 32 8.3 (±2.6) 32
 ICD-9 + CPT or J code on same day 196 76.1 (±7.6) 31 8.6 (±2.3) 38

SD= Standard Deviation, ICD-9=International Classification of Diseases, 9th Revision; CPT= Current Procedural MSU= Monosodium urate, NSAID= Non steroidal anti-inflammatory drug.

*

Gout-related medications include colchicine, NSAIDs, cox-2 selective inhibitor, and glucocorticoids.

**

Medication categories are not mutually exclusive.