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. Author manuscript; available in PMC: 2021 Nov 17.
Published in final edited form as: Mov Disord. 2021 Jun 12;36(10):2378–2386. doi: 10.1002/mds.28683

Table 1.

Potentially Confounding Comorbidity Diagnoses Recorded in Participants’ Electronic Health Recordsa.

Category Description ICD10
Cerebrovascular disease Brain stem stroke syndrome G46.3
Cerebrovascular disease, unspecified I67.9
Gait problems Abnormalities of gait and mobility R26
Ataxic gait R26.0
Difficulty in walking, not elsewhere classified R26.2
Other abnormalities of gait and mobility R26.89
Unspecified abnormalities of gait and mobility R26.9
Ataxia, unspecified R27.0
Hip osteoarthritis Unilateral primary osteoarthritis, right hip M16.11
Unilateral primary osteoarthritis, left hip M16.12
Unilateral osteoarthritis resulting from hip dysplasia, unspecified hip M16.3
Osteoarthritis of hip, unspecified M16.9
Hip replacement Presence of right artificial hip joint Z96.641
Presence of left artificial hip joint Z96.642
Presence of unspecified artificial hip joint Z96.649
Knee osteoarthritis Bilateral primary osteoarthritis of knee M17.0
Unilateral primary osteoarthritis, unspecified knee M17.10
Unilateral primary osteoarthritis, right knee M17.11
Unilateral primary osteoarthritis, left knee M17.12
Osteoarthritis of knee, unspecified M17.9
Knee replacement Presence of right artificial knee joint Z96.651
Presence of left artificial knee joint Z96.652
Presence of artificial knee joint, bilateral Z96.653
Presence of unspecified artificial knee joint Z96.659
Other movement disorders Parkinson’s disease G20
Myoclonus G25.3
Abnormal involuntary movements R25
Essential tremor G25
Tremor, unspecified R25.1
Neuropathy Idiopathic progressive neuropathy G60.3
Hereditary and idiopathic neuropathy, unspecified G60.9
Inflammatory polyneuropathy, unspecified G61.9
Polyneuropathy, unspecified G62.9
Idiopathic peripheral autonomic neuropathy G90.0
Radiculopathy Radiculopathy, lumbar region M54.16
Rheumatoid arthritis Rheumatoid arthritis with rheumatoid factor of unspecified hip without organ or systems involvement M0/5.79
Rheumatoid arthritis with rheumatoid factor, unspecified M05.9
Rheumatoid arthritis, unspecified M06.9
Spondylolisthesis Spondylolisthesis, site unspecified M43.10
Spondylolisthesis, lumbar region M43.16
Fusion of spine, site unspecified M43.2
Spinal stenosis Spinal stenosis, site unspecified M48.00
Spinal stenosis, occipito-atlanto-axial region M48.01
Spinal stenosis, thoracic region M48.04
Spinal stenosis, lumbar region M48.06
Spinal stenosis, lumbar region without neurogenic claudication M48.061
Spinal stenosis, lumbar region with neurogenic claudication M48.062
a

Codes are organized in 12 categories using the ICD10 hierarchies or similarity of diagnoses.