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Stufe Universität
Erstellt / Aktualisiert 28.02.2023 / 12.09.2023
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what are the main problems of Psychotherapy-Placebo?

-PT-Placebo without effect ist not possible

-->treatment needs to be plausible for patients & therapists

-->treatment always includes unspecific components--> contact with therapists, appreciation, expectation of improvement

-ethical issues--> clients wont get a more effective treatment; ppl. need to be informed and willing to obtain a PT-Placebo

-The more similar placebo and treatment the smaller the difference

what are problems with treatment as usual (TAU) used as a control condition?

-often low budget

-low frequency of sessions

-often badly trained therapists

-often therapists with high workload

what are requirements for drawing valid conclusions from experimantal to control groups?

-Participants in the treatment and control group need to be similar before treatment starts

-Participants will be randomly assigned to treatment conditions

-Each person has the same probability to be allocated to the treatment or control group

-requires large samples--> bei kleinen samples kann sein, dass auch mit randomiesierung spez. ausprägungen in einer der gruppe überproportional hfg. vorkommen--> je größer die samples, desto geringer die p dass dies passiert

-randomized blocks assignment

wie läuft n randomized blocks assignment ab?

-Matching participants in subgroups that are comparable on key dimensions (e.g. baseline severity of disorder)

-Members of subgroups will then be randomly assigned to treatment condition

nach westen et al. 2004; ab wann sind samples zu klein um die möglichkeiten der ranomisierung zum tragen zu bringen?

wenn n<40 pro sample

welche probleme können trotz randomisierung von Gruppen auftreten?

-Participants drop out (attrition(abnutzung), mortality)

-Differences between participants who dropped out and participants who completed the study

-Different drop out rates in different groups-->z.b. in wait list dtl. höher als in experigruppe

-Attrition -> impairs benefit of randomization; wirksamkeit könnte daraus positiv verzerrt werden

what are generel requirements for drawing valid conclusions from comparisions with contro groups?

Procedures across treatments must be equal for key variables:

-Dosage of treatment--> Length, intensity, and frequency of contact with clients

-Access to additional treatments (e.g. medication)

-Setting (individual vs. group)

-aus rationaler sicht mögliche wirksamkeit der intervention

-Degree of involvement of persons close to client (partner, friends)

was sind symptome von ner panic attack?

-surges of intense fear or intense discomfort that reach a peak within minutes with following symptoms:

-accelerated heart rate

-sweating

-shaking

-shortness of breath

-chest pain or discomfort

-fear of loosing control

-fear of dying

DSM-V criteria panic disorder

-recurrent unexpected panic attacks

-At least one of the attacks has been followed by 1 month (or more) of...

a) persistent concerns or worries about having more panic attacks

b) behavior changes in maladaptive ways because of the panic attacks (e.g., avoidance of exercise or of unfamiliar locations)

welche facts gibts zu komordibilität/prevalence bei ner panic disorder?

-12 month prevalence: 2-3%, women vs men: 2:1 (DSM-5)

-Only a minority of individuals have full remision

-2/3 occur with agoraphobia

-High comorbidity with other disorders

studie zur Efficacy of Behavioral Treatment of Panic Disorder; wie war der ablauf bei der  die Exposition & Cognitive Therapy (E&C) gruppe

-Cognitive restructuring via acquiring skiilz for re-evaluating beliefs(nalysis of faulty logic, reattribution, decatastrophizing, self instruction)

-from 6th session: cognitive skills were applied to anxiety provoking situations and sensations, in the form of an
individualized 10 item hierarchy

-Interoceptive exposure (from 6th session):
• Cognitive skills were applied to anxiety provocing situations through visualization of anxiety scenes and overbreathing.

 

studie zur Efficacy of Behavioral Treatment of Panic Disorder: wie war der ablauf bei der Progressive Muscle Relaxation (R) gruppe?

-Learning R in first sessions and exercising 2x per day

-Relaxation skill was applied to everyday anxiety and panic provoking situations, arranged in a graduated manner
on the basis of an individualized 10 item hierarchy

-From 6th session: Patients should approach a situation three times a week with the use of muscle relaxation as a
coping skill

studie zur Efficacy of Behavioral Treatment of Panic Disorder: wie war der ablauf bei Relaxation combined with exposition und cognitive therapy (Comb E&C&R)

At the begin emphasis on relaxation, with progressively more attention to cognitive- and exposure procedures

studie zur Efficacy of Behavioral Treatment of Panic Disorder: wie ist die wait list group abgelaufen?

-Patients continued daily monitoring for 15 weeks, after which time they would receive treatment

-Therapists phone-contacted clients every 2 to 3 weeks to provide feedback regarding their weekly records.

-Clients were informed that help would be available in the event of a crisis

Efficacy of Behavioral Treatment of Panic Disorder studie: inclusion + exclusion criteria

inclusion: Patients who already got other treatments not related to anxiety; Stable medication

exclusion: Alcohol- or substance abuse; Major depression, psychosis, organic brain syndrome; Other therapies of anxiety;

Begin of Psychopharmacological treatment
• less than 3 Mon. Benzodiazepines--> schlaf/beruhigungsmittel; gabarezeptoren-->inhibitorisch
• less than 6 Mon. MAO-Hemmer, tricyclic antidepressants--> Monoaminoxidasen verringert; haben aufgabe neurotransmitter im hirn aufzuspalten

welche Meassurements gibts im rahmen der stand. interviews zur erhebung bei ner panic disorder?

-Hamilton Anxiety and Depression Scales

-Clinical rating of severity (0 to 8)

welche stand. self-reports gibts bei der erhebung von von ner panic disorder?

-State-Trait Anxiety Inventory (Spielberger, Gorusch, & Lushene, 1970)

-Cognitive Somatic Anxiety Questionnaire, (Marks & Mathews, 1979)

-Fear Questionnaire (Marks & Mathews, 1979)

-Beck Depression Inventory (Beck et al., 1961)

-Psychosomatic Rating Scale (Cox, Freundlich & Meyer, 1975)

-Subjective Symptom Scale (Modification, Hafner & Marks, 1978)

zudem gabs in der studie noch self-observation--> Anxiety Rating from 0 to 8; Panic yes/no; stressful events?

Efficacy of Behavioral Treatment of Panic Disorder; in welcher form wurde das assesement vorgenommen?

Pre – Post – Follow up: 3, 6, 12, 24 months

Efficacy of Behavioral Treatment of Panic Disorder; wer ist ausgedroppt während der studie und welche eigenschaften zeichneten die leute aus?

drop outs:
* R < WL
* E&C < WL

Comparison of drop-outs vs. completers (ANOVAS)
Drop-outs had sig. lower severity at pre treatment
and sig. higher consumption of anxiolytics

warum wird ne waiting list group in effifacy studien überhaupt mit aufgenommen?

mindert meist die effektstärke der experimentaldesigns, da auch hier spontanremissionen auftreten und die dann rausgerechnet werdne können

regression to the mean als anderer punkt

Efficacy of Behavioral Treatment of Panic Disorder: welche erkenntnisse gabs aus dem pre/posttest assessement

-reduction in clinical rating of the severity of the panic disorder--> alle gruppen haben signi profitiert außer der wait list group; waren also auf signi besser als WL

-hamilton axiety score--> genau gleich wie die severity

-psychosomatic symptoms-->Exposi+CBT haben nix gebracht, nur die PMR hat signi besserung im vergleich zur wait list gebracht

-keine signi unterschiede in anderen erhebungen

Efficacy of Behavioral Treatment of Panic Disorder: wodurch haben sich treatment responders ausgezeichnet und wie haben diese in den experi gruppen im vergleich zu der WL abgeschnitten?

-Treatment responder 20% Improvement in three of four measures (post- compared to pre-measure)--> also nicht panic free sondern nur signi verbesserung

-bei PMR über 80% der VPN responder; exposi+cbt sowie kombie von allem um die 60% trotzdem alle signi besser als WL

Efficacy of Behavioral Treatment of Panic Disorder: wie wurde n high-end-state-functioning definiert und in welchen gruppen war der verbreitet?

HES = criteria completed in three of five measures:--> wichtig: erhebung direkt nach der letzten session, kein follow up
− Clinical rating of severity score ≤ 2,
− Patients self rating of severity score ≤ 2
− Mean anxiety rating ≤ 2
− no panic attack
− Subjective Symptom Total score ≤ 10

--> in jeder gruppe um die 50% der teilnehmnden und damit signi besser als WL

 

Efficacy of Behavioral Treatment of Panic Disorder: wie hat sich die sample size over time verändert

gab durchgängig in allen gruppen dropouts

Efficacy of Behavioral Treatment of Panic Disorder: was ist das ergebnis des 24 month follow up im vgl. zur post erhebung?

Decrease of trait-anxiety and somatic symptoms
(Post vs. 24 months)

BDI-Scores
• Increase in R-group
• Decrease in E & C-group

Efficacy of Behavioral Treatment of Panic Disorder: completer analysis; was bedeutet high-end-state?

bedeutet, dass die symptomatik signifikant abgenommen hat

Efficacy of Behavioral Treatment of Panic Disorder; Completer analysis, excluding drop outs, wie unterscheiden sich die verschied. Gruppen bzgl. panic-free & high-end-state?

grundlegend ergebnisse gebiased weil dropouts nicht gewertet wurden

high-end-state: kein signi Unterschied

panic free: signi höher bei exposi+cbt als bei PMR + kombitherapie

Efficacy of Behavioral Treatment of Panic Disorder; was ist bezüglich einer summary zu sagen?---> post assesement

Post Assessment: (R, E&C, E&C&R) > Wait list--> in relaxation group, less patients were panic free, However anxiety and psychosomatic symptoms were reduced

 

Efficacy of Behavioral Treatment of Panic Disorder; was ist bezüglich einer summary zu sagen?---> 2 year follow up

Maintenance of therapy success for patients with interoceptive
exposure and cognitive restructuring

Patients in relaxation group less stable patterns--> Highest drop out rate, Highest rate of additional treatment

Cognitive behavioral therapy with relaxation (E&C&R) was not
more efficacious than E&C

welche schlussfolgerungen kann man aus der Studie Efficacy of Behavioral Treatment of Panic Disorder ziehen?

-Panic disorder without agoraphobic avoidance can be efficaciously treated with a combination of interoceptive exposure(das ist quasi ne in sensu exposi) + cognitive restructuring

-Directly after treatment, relaxation is as efficacious as interoceptive exposure + cognitive restructuring, but in the long run it is less efficacious

-Compared to results in the literature, long term effects of interoceptive exposure and cognitive restructuring seem to be
better than for pharmacological treatment

efficacy of Behavioral Treatment of Panic Disorder, wleche limitations gitbs bei der studie?

-small sample size welche die power negativ beeinflusst

-conditions in der follow up(24months): wurde ned kontrolliert ob zwisschendrin medis oder ne psychotherapie gemacht/genommen wurde--> diese daten sind least robust

-wenn man generell schon angstlösende medis gibt, dann ist die wirkung der exposi vermindert da ne habituation ufgrund des mediinduzierten niedrigen arousals ned stattfinden kann

historie von trizyklische antidepressive; wo werden diese eingesetzt?

-initially developed as a tranquilizer for patients with schizophrenia, antidepressant effects were discovered serendipitously

-increases the extracellular level of neurotransmitters (serotonin, norepinephrine) by limiting their reabsorption (reuptake) into the presynaptic cells

-broad range of effects: Improves mood, reduces symptoms of agitation and anxiety

-side effects: e.g. dry mouth, drowsiness, dizziness, blurred vision, low blood pressure,

studie "CBT, pharmacotherapy, or their combination? Panic disorder"; warum wurde die überhaupt durchgeführt?

-Relative and combined efficacies of drug and PT treatment for PD have not been evaluated

ziel herauszufinden, ob...

-drug and PT for PD are each more efficacious than placebo

-one treatment is more efficacious than the other

-combined therapy is more efficacious than either therapy alone?

was wird verhindert wenn man ne studie als doube-blind-studie konzipiert?

expectancy effects

CBT, pharmacotherapy, or their combination bei panic disorder; wie liefs bei den einzelnen gruppen ab?

- CBT: individual 50-minute sessions --> Interoceptive exposure, cognitive restructuring, and breathing training

-Psychopharmacotherapy (Imipramine or Placebo) + Clinical Management: jede session gabs nen 30minuten kontakt wo die vitalwerte überprüft wurden und fragen gestellt wurden, ob alles passt

-Combined Treatment (Imipramine or Placebo + CBT) -->individual contacts with 2 therapists for about 75 minutes per week.

zudem bei allen kontrolle, ob benzos eingenommen wurden

--> die maintenance phase hat insgesamt 6 monate gedauert bevor man sie beendet hat

CBT, pharmacotherapy, or their combination bei panic disorder; welche arten von assesement gab es?

-at baseline--> also direkt am ende der maintenance phase
▪ after acute phase (3 months after baseline)
▪ after 6 months maintenance phase (9 months after baseline)
▪ after 6 months follow-up phase (15 months after baseline)

CBT, pharmacotherapy, or their combination bei panic disorder; was und wie wurde das im assesement erhoben?

patienten wurden gejudged auf basis von...

-Panic Disorder Severity Scale (PDSS)--> Response was defined > 40% reduction of PD symptoms

-Clinical Global Impression Scale (CGI)--> 7-point ratings on 2 items: overall improvement and severity

-Definition responder: CGI much improved (≤ 2) and mild or less (≤ 3) on CGI severity

-Patients who received non-study treatment for anxiety wurden automatisch zu nonresponders + nonimproved erklärt

CBT, pharmacotherapy, or their combination bei panic disorder, was waren Einschlusscriteria`?

Potential participants met DSM-III-R or DSM-IV criteria for PD with no
more than mild agoraphobia (ADIS-R avoidance scale ≤ 18)
▪ Panic attack(s) in the 2 weeks before treatment
▪ Patients with comorbid unipolar depression were not excluded
▪ Patients were permitted to take benzodiazepines (limited doses) until
end of acute phase

CBT, pharmacotherapy, or their combination bei panic disorder, was waren Ausschlusscriteria?

psychotic, bipolar, or significant medical illnesses,
▪ suicidality, significant substance abuse,
▪ contraindications to either treatment,
▪ prior nonresponse to similar treatments,
▪ concurrent competing treatment or pending disability claims

CBT, pharmacotherapy, or their combination bei panic disorder; was ist bei der Anzahl von VPn in den verschied. Gruppen aufgefallen?

alle gruppen ähnlich(80-60vpn) nur die placebo only gruppe hatte dtl. weniger(24vpn); ethin. aspekt dabei im fokus