Table 3. Demographics for Subjects.
| Sub ID | Age | Sex | Hand | Ethnicity | Pain Thresh Level | Duration Since Onset of Condition | Meds Taken | Duration Meds Taken (Years) |
| *CP01 | 56 | F | R | C | 0.8 | 0.5 | Diovan | 0.167 |
| Ovar | 2 | |||||||
| Marapex | 3 | |||||||
| Ibuprofen | 10 | |||||||
| Protonex | 10 | |||||||
| CP02 | 65 | F | A | C | 0.75 | 0.5 | Vit Sup | 0.5 |
| CP03 | 52 | F | R | C | 0.6 | 5 | Cambalta | 2 |
| Motrin | 2 | |||||||
| CP04 | 61 | F | R | C | 1 | 2 | None | 0 |
| CP05 | 55 | M | L | C | 1.8 | 1 | Vit Sup | 1 |
| CP06 | 46 | F | R | C | 0.3 | 1 | Dilantin | 1 |
| Lavoxyl | 1 | |||||||
| Vit Sup | 1 | |||||||
| CP07 | 47 | F | R | C | 0.5 | 2 | None | 0 |
| CP08 | 43 | M | R | C | 1.2 | 5 | Flexeril | 15 |
| Skelaxin | 0.67 | |||||||
| CP09 | 46 | M | R | B | 1.1 | 0.5 | Sevella | 0.083 |
| CP10 | 52 | F | R | B | 0.5 | 5 | Ibuprofen | 15 |
| Vit Sup | 15 | |||||||
| CP11 | 56 | F | R | C | 0.5 | 5 | Percocet | 5 |
| Mirapex | 5 | |||||||
| Trazadone | 5 | |||||||
| CP12 | 49 | M | L | C | 1 | 5 | None | 0 |
| CP13 | 46 | F | R | B | 0.6 | 0.5 | Ibuprofen | 8 |
| NC01 | 39 | F | R | C | 1.2 | |||
| NC02 | 42 | F | L | C | 0.5 | |||
| NC03 | 62 | M | A | C | 0.4 | |||
| NC04 | 50 | F | R | C | 0.8 | |||
| NC05 | 59 | F | R | C | 0.6 | |||
| NC06 | 47 | M | R | B | 0.8 | |||
| NC07 | 46 | F | R | B | 0.5 | |||
| *NC08 | 51 | F | R | C | 0.7 | |||
| NC09 | 59 | F | R | C | 0.6 | |||
| NC10 | 44 | F | R | C | 0.9 | |||
| NC11 | 38 | M | L | C | 0.6 | |||
| NC12 | 40 | F | R | C | 0.5 | |||
| NC13 | 56 | M | R | B | 0.5 |
Sex: F = Female; M = Male. Hand: L = Left; R = Right; a = Ambidextrous. Ethnicity: C = Caucasian; B = Black African American. Pain Thresh Level = Pain Threshold Level of electrical stimulation used in fMRI; Meds = Medication; Vit Sup = Vitamin Supplements.
*Denotes the two individuals misclassified by the Sparse Logistic Regression decoder. All Chronic Pain subjects were diagnosed with muscle-skeletal lower back chronic pain.