Brief Postoperative Pain Management Intervention: Meaning Making Amendment

实验性的：Meaning Making Questions

行为的：Mindfulness + Meaning Making Questions

Participants randomized to this arm will receive a brief, text-message-delivered mindfulness intervention two days after total knee or hip replacement surgery. The intervention consists of a 5-minute guided mindful breathing practice that begins with visually paced breathing and then transitions to audio-guided mindful awareness of the breath. Immediately afterward, participants will answer personalized meaning-making questions designed to help them reflect on what stood out during the practice and how that experience related to their pain, relaxation, or coping.

有源比较器：Implementation Questions

行为的：Mindfulness + Implementation Questions

Participants randomized to this arm will receive a brief, text-message-delivered mindfulness intervention two days after total knee or hip replacement surgery. The intervention consists of a 5-minute guided mindful breathing practice that begins with visually paced breathing and then transitions to audio-guided mindful awareness of the breath. Immediately afterward, participants will answer two implementation-focused questions about how the intervention could best be delivered or used in postoperative care, such as preferred timing, length, or mode of delivery.

Change in Pain Unpleasantness

Single item assessing pain unpleasantness ("How unpleasant is your pain?") scored on an 11-point (0=Not unpleasant, 10=The most unpleasant pain imaginable) numeric rating scale. Higher scores indicate greater pain unpleasantness.

Change in Pain Intensity

Single item assessing pain intensity ("How much pain do you have?") scored on an 11-point (0=No pain, 10=Pain as bad as you can imagine) numeric rating scale. Higher scores indicate greater pain intensity.

Change in Pain Medication Desire

Single item assessing pain unpleasantness ("How much do you want to take pain medicine?") scored on an 11-point (0=Not at all, 10=Extremely) numeric rating scale. Higher scores indicate greater desire for pain medicine.

Change in Anxiety

Single item assessing pain unpleasantness ("How nervous, anxious, or on edge do you feel?") scored on an 11-point (0=Not at all, 10=Anxiety as bad as you can imagine) numeric rating scale. Higher scores indicate greater anxiety.

Postoperative Patient Reported Outcomes Measurement Information System (PROMIS) Physical Functioning Item Bank, v2.0

The PROMIS physical functioning computer assisted test draws from a bank of 123 items all scored on a 5 point Likert scale. T-Score distributions are standardized such that a 50 represents the average (mean) for the US general population, and the standard deviation around that mean is 10 points. A high score reflects better physical functioning.