Table S1.

Hospitalization codes related or possibly related to chronic pain

• Adhesive capsulitis of shoulder

• Algoneurodystrophy, unspecified

• Arthritis, unspecified

• Articular ankylosis

• Articular ankylosis – knee joint

• Carpal tunnel syndrome

• Cervicalgia

• Chronic intractable pain

• Chronic salpingitis and oophoritis

• Coxarthrosis, unspecified

• Endometriosis of uterus

• Endometriosis, unspecified

• Fibromyalgia

• Gonarthrosis, unspecified

• Gout, unspecified

• Idiopathic gout – elbow joint

• Idiopathic gout – hand joints

• Irritable bowel syndrome with diarrhea

• Irritable bowel syndrome without diarrhea

• Lateral epicondylitis

• Low back pain

• Osteoarthritis, unspecified

• Other cervical disc displacement

• Other dorsalgia

• Other specified arthrosis

• Other specified disorders of bone – leg

• Other specified intervertebral disc displacement

• Other specified spondylopathies – cervical region

• Pain in limb – scapular region

• Radiculopathy – dorsal region

• Rheumatoid arthritis, unspecified

• Rotator cuff syndrome

• Spinal instabilities – lumbar region

• Spinal stenosis – cervical region

• Spinal stenosis – lumbar region

• Spondylosis, unspecified – lumbar region