Effects of Mindfulness-Based Stress Reduction on Experimental Pain Sensitivity and Cortisol Responses in Women With Early Life Abuse: A Randomized Controlled Trial.
Study Goal
The researchers aimed to determine whether Mindfulness-Based Stress Reduction (MBSR) is particularly effective for women with a history of early life abuse (ELAb) in improving stress responsivity, pain sensitivity, and psychopathology symptoms.
Results Summary
MBSR improved central sensitization, cortisol response, and emotion regulation abilities in women with ELAb, while also showing benefits in depression symptoms and impulse control. However, it had mixed effects on pain sensitivity, increasing temporal summation in ELAb women but decreasing cold pressor tolerance in non-ELAb women.
Population
Medically healthy women (mean age = 31 years) with or without a history of early physical or sexual abuse (≤13 years).
Effective Dosage
Standard MBSR (8-week program, exact dosage not specified).
Duration
8 weeks.
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
Mindfulness-based stress reduction (MBSR) | increase | temporal summation of heat pain intensity ratings | women with early life abuse (ELAb) | - | increased | #1 |
Mindfulness-based stress reduction (MBSR) | decrease | cortisol AUC | women with early life abuse (ELAb) | - | reduced | #2 |
Mindfulness-based stress reduction (MBSR) | decrease | cold pressor tolerance | women without early life abuse (ELAb) | - | decreased | #3 |
Mindfulness-based stress reduction (MBSR) | decrease | temporal summation of heat pain intensity ratings | women without early life abuse (ELAb) | - | decreased | #4 |
Mindfulness-based stress reduction (MBSR) | decrease | depression symptoms | women with or without early life abuse (ELAb) | - | improved | #5 |
Mindfulness-based stress reduction (MBSR) | increase | emotion regulation abilities | women with or without early life abuse (ELAb) | - | improved | #6 |
social support (SSG) | decrease | depression symptoms | women with or without early life abuse (ELAb) | - | improved | #7 |
social support (SSG) | increase | emotion regulation abilities | women with or without early life abuse (ELAb) | - | improved | #8 |
Mindfulness-based stress reduction (MBSR) | increase | describing emotions | women with early life abuse (ELAb) | - | was associated with greater benefits in | #9 |
Mindfulness-based stress reduction (MBSR) | increase | impulse control | women with early life abuse (ELAb) | - | was associated with greater benefits in | #10 |
OBJECTIVE: Early life abuse (ELAb) initiates pathophysiological cascades resulting in long-term maladaptive stress responsivity, hyperalgesia, and an increased risk of psychopathology. Mindfulness-based stress reduction (MBSR) is effective in modifying psychological and somatic symptoms; thus, we predicted that MBSR would be particularly efficacious for women with ELAb. METHOD: Medically healthy women (mean age = 31 years) with or without a history of early (≤13 years) physical or sexual abuse provided self-report measures and were tested in the laboratory before and after randomization to standard MBSR (n = 52) or social support (SSG) (n = 60) for 8 weeks. The laboratory procedure involved pain testing using the cold pressor and temporal summation of heat pain (indexing central sensitization) procedures, and exposure to the Trier Social Stress Test. Plasma cortisol in response to the experimental protocol was assessed as area under the curve (AUC). RESULTS: The interventions differentially impacted pain sensitivity and cortisol AUC for women with ELAb, as MBSR increased the temporal summation of heat pain intensity ratings (p = .024) and reduced cortisol AUC (p = .004). For women without ELAb, MBSR decreased cold pressor tolerance (p = .045) and decreased the temporal summation of heat pain intensity ratings relative to SSG (p = .024). Both MBSR and SSG improved depression symptoms and emotion regulation abilities (p values < .001); however, MBSR was associated with greater benefits in describing emotions (p = .008) and impulse control (p = .017) for women with ELAb. CONCLUSIONS: Women with ELAb benefited from MBSR-specific improvements in central sensitization, mindfulness skills, and emotion regulation abilities. This is the first study to examine the efficacy of MBSR in modifying affective and somatic symptoms based on ELAb status and provides evidence for considering ELAb in tailoring treatment approaches.Trial Registration: ClinicalTrials.gov Identifier: NCT01995916; https://clinicaltrials.gov/ct2/show/NCT01995916.