P value interpretations and considerations

Thiese, Matthew S.; Ronna, Brenden; Ott, Ulrike

doi:10.21037/jtd.2016.08.16

Cited by 311 publications

(217 citation statements)

References 12 publications

(12 reference statements)

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“…In addition, to examine whether the changes observed in the fracture resistance of the nanocomposite specimens are just due to the different contents of CNTs rather than other factors related to the uncertainties of the experiments, analysis of variance (ANOVA) is performed for the experimental data obtained for each loading mode. As it is seen in Figure 5 (b), all the P-values of the mentioned statistical analysis calculated for the three loading modes satisfy the P ≤ 0.05 condition, 50 which means that the CNTs weight percentage has affected the resulted fracture toughnesses.…”

Section: Fracture Tests Executionmentioning

confidence: 74%

Experimental fracture investigation of CNT/epoxy nanocomposite under mixed mode II/III loading conditions

Karami

Ayatollahi

Saboori

2020

Fatigue Fract Eng Mat Struct

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For the first time, the brittle fracture of epoxy‐based nanocomposite reinforced with MWCNTs (multi‐walled carbon nanotubes) and subjected to mixed mode II/III loading conditions is investigated. This experimental investigation is carried out using a newly developed test configuration. Araldite LY 5052 epoxy, which is a resin frequently used in aerospace industry, is utilized to fabricate pure epoxy and nanocomposite test specimens with two different MWCNTs contents of 0.1 and 0.5 wt%. The obtained experimental results reveal that adding MWCNTs to epoxy resin up to 0.5 wt% improves the fracture toughness under pure mode II and pure mode III loading with an increasing trend. This is while the improvement under mixed mode II/III loading is reduced by adding nanotubes more than 0.1 wt%. To justify the variations of fracture toughness in terms of nanoparticles content, SEM (scanning electron microscopy) photographs of the fracture surfaces of the specimens in the vicinity of the initial crack front are prepared. Additional fracture mechanisms caused by adding carbon nanotubes are discussed in detail based on the provided SEM images.

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Section: Fracture Tests Executionmentioning

confidence: 74%

Experimental fracture investigation of CNT/epoxy nanocomposite under mixed mode II/III loading conditions

Karami

Ayatollahi

Saboori

2020

Fatigue Fract Eng Mat Struct

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“…A priori, a p value of 0.15 was set to determine presence of effect modification. 38 We report ethnic-specific associations between SDB and outcomes from stratified models for ease of interpretation.…”

Section: Discussionmentioning

confidence: 99%

Sleep‐disordered breathing and poststroke outcomes

Lisabeth

Sánchez

Lim

et al. 2019

Annals of Neurology

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Objective: To examine the association between sleep-disordered breathing and stroke outcomes, and determine the contribution of sleep-disordered breathing to outcome disparities in Mexican Americans. Methods: Ischemic stroke patients (n = 995), identified from the population-based Brain Attack Surveillance in Corpus Christi Project (2010Project ( -2015, were offered participation in a sleep-disordered breathing study including a home sleep apnea test (ApneaLink Plus). Sleep-disordered breathing (respiratory event index ≥10) was determined soon after stroke. Neurologic, functional, cognitive, and quality of life outcomes were assessed at 90 days poststroke. Regression models were used to assess associations between sleep-disordered breathing and outcomes, adjusted for sociodemographics, prestroke function and cognition, health-risk behaviors, stroke severity, and vascular risk factors. Results: Median age was 67 years (interquartile range [IQR] = 59-78); 62.1% were Mexican American. Median respiratory event index was 14 (IQR = 6-25); 62.8% had sleep-disordered breathing. Sleep-disordered breathing was associated with worse functional outcome (mean difference in activities of daily living/instrumental activities of daily living score = 0.15, 95% confidence interval [CI] = 0.01-0.28) and cognitive outcome (mean difference in modified Mini-Mental State Examination = −2.66, 95% CI = −4.85 to −0.47) but not neurologic or quality of life outcomes. Sleep-disordered breathing accounted for 9 to 10% of ethnic differences in functional and cognitive outcome and was associated with cognitive outcome more strongly for Mexican Americans (β = −3.97, 95% CI = −6.63 to −1.31) than non-Hispanic whites (β = −0.40, 95% CI = −4.18 to 3.39, p-interaction = 0.15). Interpretation: Sleep-disordered breathing is associated with worse functional and cognitive function at 90 days poststroke. These outcomes are reasonable endpoints for future trials of sleep-disordered breathing treatment in stroke. If effective, sleep-disordered breathing treatment may somewhat lessen ethnic stroke outcome disparities.

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“…The SPSS 17.0 statistical package was used for data analysis. Following Thiese, Ronna, and Ott (), a P < .05 threshold was applied for simple effects whereas a P < .10 was used for complex relationships (i.e., mediation tests and multiple comparison adjustments).…”

Section: Methodsmentioning

confidence: 99%

Effects of male postpartum depression on father–infant interaction: The mediating role of face processing

Koch

Pascalis

Vivian

et al. 2019

Infant Mental Health Journal

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It is estimated that postpartum depression affects up to 25% of men. Despite such high prevalence, the majority of studies on postpartum depression are focused on mothers, and the role of paternal depression and its effects on infant development have been overlooked by researchers and clinicians. The present study aimed to fill this gap by investigating the effect of paternal postpartum depression on father–infant interactions. In addition, we examined whether differences in face recognition mediated the effects of paternal postpartum depression on father–infant interactions. A total of 61 father–infant dyads (17 postpartum depression, 44 controls) took part in the study. Results revealed that compared to controls, fathers with postpartum depression had a worse pattern of interaction with their infants on measures of responsiveness, mood, and sensitivity; they also had greater difficulty in recognizing happy adult faces, but greater facility in recognizing sad adult faces. Depressed fathers attributed greater intensities to sad adult and infant faces. The tendency to attribute greater intensity to sad adult faces was confirmed as a partial mediator of the effect of paternal postpartum depression on measures of father responsiveness and as a full mediator of the effects of paternal depression on father sensitivity. Clinical implications and suggestions for further studies are discussed.

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P value interpretations and considerations

Cited by 311 publications

References 12 publications

Experimental fracture investigation of CNT/epoxy nanocomposite under mixed mode II/III loading conditions

Experimental fracture investigation of CNT/epoxy nanocomposite under mixed mode II/III loading conditions

Sleep‐disordered breathing and poststroke outcomes

Effects of male postpartum depression on father–infant interaction: The mediating role of face processing

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