Department of Psychology
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Browsing Department of Psychology by Subject "acute pain"
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Item Open Access A longitudinal analysis of the development of infant facial expressions in responses to acute pain: Immediate and regulatory expressions(Pain, 2012) Ahola Kohut, Sara; Pillai Riddell, Rebecca; Flora, David; Oster, HarrietFacial expressions during infancy are important to examine as infants do not have the language skills to describe their experiences. This is particularly vital in the context of pain where infants depend solely on their caregivers for relief. The objective of the current study was to investigate the development of negative infant facial expressions in response to immunization pain over the first year of life. Infant facial expressions were examined longitudinally using a subsample of 100 infants that were each videotaped during their 2-, 4-, 6-, and 12-month routine immunization appointments. Infant facial expressions were coded using BabyFACS for the first minute after a painful needle prick. Facial expressions were examined with a catalogue of the most commonly occurring facial expressions. Results demonstrated that clear differences were seen over ages. Infants display a variety of facial expressions with some of the components of adult pain expressions immediately after the needle and abate shortly after. However, infants did not display adult expressions of discrete negative emotions. Instead, infants display a variety of generalized pain and distress faces aimed at gaining caregiver aid. The development of non-verbal communication in infants, particular facial expressions, remains an important area of inquiry. Further study into accurately measuring infant negative emotions, pain, and distress is warranted.Item Open Access Acute pain after total hip arthroplasty does not predict the development of chronic postsurgical pain 6 months later(Springer Verlag, 2010) Clarke, Hance; Kay, Joseph; Mitsakakis, Nicholas; Katz, JoelPurpose Much remains unknown about the relationship between acute postoperative pain and the development of pathologic chronic postsurgical pain (CPSP). The purpose of this project was to identify the extent to which maximum pain scores on movement over the first two days after total hip arthroplasty predicted the presence of chronic pain 6 months later after controlling for potentially important covariates. Methods The sample comprised 82 of 114 patients who participated in a double-blinded randomized controlled trial in which all patients received acetaminophen 1 g p.o., celecoxib 400 mg p.o., and dexamethasone 8 mg i.v., 1–2 h preoperatively. In addition, patients received gabapentin (GBP) 600 mg (G2) or placebo (G1 and G3) 2 h prior to surgery [G1: placebo/placebo (n = 38); G2: GBP/placebo (n = 38); G3: placebo/GBP (n = 38)]. In the PACU, patients received gabapentin 600 mg (G3) or placebo (G1 and G2). Follow-up data from the 82 patients who were contacted by telephone 6 months postsurgery were used for the current study. Results Maximal movement-evoked pain intensity over the first two postoperative days (P = 0.38) failed to predict the presence of CPSP 6 months later after controlling for age (P = 0.09), treatment group (P = 0.91), and cumulative morphine consumption (P = 0.8) (multivariate logistic regression likelihood ratio test against the intercept only model P = 0.59). Conclusion Neither maximum movement-evoked acute pain, nor any other factor measured, predicted the presence of CPSP at 6 months. Further research is needed to identify risk factors for CPSP after total hip arthroplasty.Item Open Access Infant Clinical Pain Assessment: Core Behavioural Cues(The Journal of Pain, 2018) DiLorenzo, Miranda; Pillai Riddell, Rebecca; Flora, David; Craig, KennethDiverse behavioral cues have been proposed to be useful cues in infant pain assessment, but there is a paucity of evidence on the basis of formal psychometric evaluation to establish their validity for this purpose. We aimed to examine 2 widely used coding systems, the Neonatal Facial Coding System (NFCS) and the Modified Behavior Pain Scale (MBPS), by examining their factor structures with confirmatory factor analysis using a large archival data set. The results indicated that an item-reduced NFCS scale with 3 items produced a 1-factor pain model that maintained the good psychometric properties of the 7-item scale. In addition, it was found that MBPS also has challenging internal consistency, with items that are weakly correlated as well as highly redundant. One item of the MBPS may be able to capture the construct of pain equally well or potentially improve its psychometric properties. Redefinition of the MBPS with cry as a sole indicator was suggested. This analysis provides 2 new iterations of the NFCS and MBPS that improve construct validity and internal consistency. These shorter versions also improve the feasibility of both measures and increase their potential for clinical use because less time is required for their administration. PERSPECTIVE: This article presents new iterations of the NFCS and MBPS scales. These revised measures improve the internal consistency of the measures, feasibility of use of the tools in research settings, and the efficiency of the coding process. The revised tools could also improve the feasibility of coding within clinical settings.Item Open Access Infant pain-regulation as an early predictor of childhood temperament(2013) Stevens, Sara; Racine, Nicole; Pillai Riddell, Rebecca; Horton, Rachel; Garfield, Hartley; Greenberg, SaulBACKGROUND: There is considerable variability in infants’ responses to painful stimuli, including facial and vocal expressions. This variability in pain-related distress response may be an indicator of temperament styles in childhood. OBJECTIVE: To examine the relationships among immunization pain outcomes (pain reactivity, pain regulation and parent ratings of infant pain) over the first year of life and parent report of early temperament. METHODS: A subset of parent-infant dyads in an ongoing Canadian longitudinal cohort was studied. Infant pain behaviours were coded using the Modified Behavior Pain Scale. Parental judgments of infant pain were recorded using the Numeric Rating Scale. Infant temperament was measured using the Infant Behaviour Questionnaire-Revised. Correlational analyses and multiple regressions were conducted. RESULTS: Multiple regressions revealed that the 12-month regulatory pain scores predicted parent ratings of the Negative Affectivity temperament dimension at 14 months of age. Parent ratings of infant pain at 12 months of age predicted parent ratings of the Orienting/Affiliation temperament dimension, with sex differences observed in this substrate. CONCLUSION: Pain-related distress regulation at one year of age appears to be a novel indicator of parent report of temperament ratings. Pain outcomes in the first six months of life were not related to parent temperament ratings.Item Open Access Non-pharmacological management of infant and young child procedural pain: An abridged Cochrane review(Pain and Research Management, 2011) Pillai Riddell, Rebecca; Racine, Nicole; Turcotte, Kara; Uman, Lindsay; Horton, Rachel; Ahola Kohut, Sara; Din Osmun, Laila; Hillgrove-Stuart, Jessica; Stevens, Bonnie; Lisi, DianaBACKGROUND: Acute pain and distress during medical procedures are commonplace for young children. OBJECTIVE: To assess the efficacy of nonpharmacological interventions for acute procedural pain in children up to three years of age. METHODS: Study inclusion criteria were: participants <3 years of age, involved in a randomized controlled or crossover trial, and use of a ‘no-treatment’ control group (51 studies; n=3396). Additional studies meeting all criteria except for study design (eg, use of active control group) were qualitatively described (n=20). RESULTS: For every intervention, data were analyzed separately according to age group (preterm-born, term-born neonate and older infant/young child) and type of pain response (pain reactivity, immediate pain-related regulation). The largest standardized mean differences (SMD) for pain reactivity were as follows: sucking-related interventions (preterm: −0.42 [95% CI −0.68 to −0.15]; neonate −1.45 [CI −2.34 to −0.57]), kangaroo care (preterm −1.12 [95% CI −2.04 to −0.21]), and swaddling/facilitated tucking (preterm −0.97 [95% CI −1.63 to −0.31]). For immediate pain-related regulation, the largest SMDs were: sucking-related interventions (preterm −0.38 [95% CI −0.59 to −0.17]; neonate −0.90 [CI −1.54 to −0.25]), kangaroo care 0.77 (95% CI −1.50 to −0.03]), swaddling/facilitated tucking (preterm −0.75 [95% CI −1.14 to −0.36]), and rocking/holding (neonate −0.75 [95% CI −1.20 to −0.30]). The presence of significant heterogeneity limited confidence in nonsignificant findings for certain other analyses. CONCLUSIONS: Although a number of nonpharmacological treatments have sufficient evidence supporting their efficacy with preterm infants and healthy neonates, no treatments had sufficient evidence to support efficacy with healthy older infants/young children.Item Open Access The role of infant pain behaviour in predicting parent pain ratings(Pain and Research Management, 2014) Pillai Riddell, Rebecca; Flora, David; Stevens, Bonnie; Greenberg, Saul; Garfield, HartleyBACKGROUND: Research investigating how observers empathize or form estimations of an individual experiencing pain suggests that both characteristics of the observer (‘top down’) and characteristics of the individual in pain (‘bottom up’) are influential. However, experts have opined that infant behaviour should serve as a crucial determinant of infant pain judgment due to their inability to self-report. OBJECTIVE: To predict parents’ immunization pain ratings using archival data. It was hypothesized that infant behaviour (‘bottom up’) and parental emotional availability (‘top down’) would directly predict the most variance in parent pain ratings. METHODS: Healthy infants were naturalistically observed during their two-, four-, six- and/or 12-month immunization appointments. Crosssectional latent growth curve models in a structural equation model context were conducted at each age (n=469 to n=579) to examine direct and indirect predictors of parental ratings of their infant’s pain. RESULTS: At each age, each model suggested that moderate amounts of variance in parent pain report were accounted for by models that included infant pain behaviours (R2=0.18 to 0.36). Moreover, notable differences were found for older versus younger infants with regard to parental emotional availability, infant sex, caregiver age and amount of variance explained by infant variables. CONCLUSIONS: The results of the present study suggest that parent pain ratings are not predominantly predicted by infant behaviours, especially before four months of age. Current results suggest that recognizing infant pain behaviours during painful events may be an important area of parent education, especially for parents of very young infants. Further work is needed to determine other factors that predict parent judgments of infant pain.