Pain Conditions	Unweighted Number of Observations	No Comorbidity (%)	Plus Any of the Following Pain Conditions (%)
			Arthritis	Back/ Neck Pain	Headaches	Chest Pain	Nonspecific Pain
No pain	410	—	—	—	—	—	—
Arthritis	1,283	27.3	—	66.4	27.3	19.2	12.4
Back/neck	953	6.4	88.6	—	34.6	25.7	15.5
Headaches	422	6.6	83.8	79.6	—	36.9	22.2
Chest pain	280	3.1	85.6	85.9	53.5	—	26.9
Nonspecific	201	10.9	78.2	73.5	45.7	38.2	—

Note: “No disease/pain” means the participant did not have any of the conditions in this table. “No comorbidity” means the participant had only the disease in the row of the table and not the diseases in the column. Proportions are for participants with the row diseases.