Table 1. Participant sociodemographic and health-related variables and 4-weeks before intervention data.
| PACT (n=15) | UC (n=15) | ||
| Age (years) | 73.3 ± 7.0 | 75.1 ± 6.9 | |
| Gender (female, n) | 14 | 13 | |
| BMI (kg/m2) | 24.5 ± 3.5 | 25.9 ± 3.1 | |
| Education level (n) | Junior high school | 3 | 5 |
| High school | 10 | 10 | |
| Junior college | 2 | 0 | |
| Marital status (married, n) | 13 | 14 | |
| Household size (n) | 2.0 ± 1.1 | 2.3 ± 1.3 | |
| Duration pain (month) | 64.1 ± 64.5 | 27.9 ± 28.9 | |
| Rehabilitation outpatient period (month) | 9.2 ± 9.1 | 9.4 ± 9.2 | |
| KL-grading | 2.1 ± 0.5 | 2.2 ± 0.8 | |
| Physical disability | 36.6 ± 14.1 | 30.9 ± 12.7 | |
| Psychological inflexibility | Pain avoidance | 27.2 ± 11.4 | 28.3 ± 11.9 |
| Cognitive fusion | 16.6 ± 3.9 | 16.7 ± 4.0 | |
| Pain intensity | 46.6 ± 18.3 | 51.4 ± 17.9 | |
| Anxiety | 4.93 ± 3.3 | 3.0 ± 2.1 | |
| Depression | 4.93 ± 2.3 | 4.4 ± 2.3 | |
| Physical function (sec) | 10.1 ± 2.4 | 11.2 ± 2.3 | |
| Physical activity (%) | SB | 52.2 ± 13.6 | 60.7 ± 12.9 |
| LPA | 42.6 ± 9.1 | 35.3 ± 12.5 | |
| MVPA | 6.2 ± 5.4 | 6.0 ± 6.3 |
PACT: physical therapist-delivered acceptance and commitment therapy; UC: usual care; BMI: body mass index; KL-grading: Kellgren–Lawrence grading; SB: sedentary behavior; LPA: light-intensity physical activity; MVPA: moderate-to-vigorous intensity physical activity.