Intolerance of uncertainty and responsibility for harm predict nocturnal panic attacks

An exploratory and confirmatory factor analysis study of the EPDS in postnatal Italian-speaking women

BACKGROUND

Depression and anxiety are the most prevalent emotional difficulties in the perinatal period and there is agreement that early intervention is an important strategy to prevent long-lasting effects on mother and child. Literature has recently shown that the Edinburgh Postnatal Depression Scale (EPDS) is able to measure not only depression but also anxiety.

OBJECTIVE

To investigate the factorial structure of the EPDS in Italian-speaking new mothers.

METHOD

416 women attending vaccination services between 2 and 4 months postpartum filled in the EPDS. Exploratory (EFA) and Confirmatory (CFA) analyses were carried out.

RESULTS

The EFA on the first part of the sample (n = 208) showed a two-factor structure. The CFAs on the second sample of mothers (n = 208) provided support for the 'EPDS-4A', with items 3,4,5,6 belonging to the Anxiety factor and items 1,2,7,8,9,10 to the Depression factor. The fit for the model was good: χ2/df = 1.41, p <.001; GFI =.99; CFI =.99; TLI =.88; RMSEA =.04.

CONCLUSION

A two-factor structure of the EPDS was confirmed suggesting that the EPDS can be used to screen for both depression and anxiety for Italian mothers in the postnatal period.

Comparing symptom networks of daytime and nocturnal panic attacks in a community-based sample

Nocturnal panic refers to waking in a state of panic without obvious triggers, experiencing the same symptoms as panic attacks that occur while awake. Interrelationships between daytime and nocturnal panic symptoms have not been examined despite theories suggesting panic symptoms perpetuate one another in a forward feedback loop. The current study compared associations between symptoms in daytime and nocturnal panic using network analysis. Network theory conceptualizes symptoms as causing one another, rather than originating from a latent variable (i.e., a disorder). Given that nocturnal panic originates from sleep stages without cognitive activity, cognitive symptoms were expected to be more central in daytime panic networks than nocturnal panic networks. Prior literature indicates similar nocturnal and daytime panic severity; thus, we expected that panic groups would report equivalent panic symptom severity. An online community sample (N = 215) provided panic symptom history. Panic network structures did not differ, although the daytime panic network produced stronger and more numerous connections between physical and cognitive symptoms. The nocturnal panic group, however, reported more severe cognitive symptoms than the daytime panic group. These results challenge biologically-focused nocturnal panic theories and suggest a more significant role of cognitive symptoms in perpetuating nocturnal panic attacks once the individual awakens.

Expanding Fear of Loss of Vigilance: Intolerance of Uncertainty, Responsibility for Harm, and Fear of Sleep for Predicting Nocturnal Panic

OBJECTIVE/BACKGROUND

Nocturnal panic involves experiencing panic attacks out of a sleeping state without obvious causes. Roughly half of patients with panic disorder will experience nocturnal panic in addition to panic attacks while awake, or daytime panic. Like daytime panic, nocturnal panic also occurs in other disorders such as PTSD. The Fear of Loss of Vigilance theory is currently the only model available to explain nocturnal panic. It suggests nocturnal panickers fear states in which they cannot easily react to or protect themselves from danger. The current study sought to expand upon the existing theory by including constructs from the broader anxiety literature. Nocturnal panickers were expected to report higher scores on these measures when compared to daytime panickers and non-panickers.

PARTICIPANTS

A sample of 166 participants were screened for panic history.

METHODS

Participants completed self-report measures regarding panic attacks, fear of sleep, intolerance of uncertainty, responsibility for harm, and fear of loss of vigilance.

RESULTS

Measures of fear of sleep and responsibility for harm successfully differentiated nocturnal from daytime panickers, whereas measures of intolerance of uncertainty and fear of loss of vigilance did not.

CONCLUSIONS

These results provide partial support for the Fear of Loss of Vigilance theory. Modifications to the theory to incorporate additional constructs are suggested.

The association between nocturnal panic attacks and suicidal ideation, plans, and attempts

Panic and sleep disturbances are established risk factors for suicide. Nocturnal panic attacks, which occur out of sleep, represent an intersection of these risk factors. Only one study to date has examined this relationship, but measured suicidality as a unitary construct. This represents a significant gap in the literature, considering most individuals who think about suicide do not make a plan and most who make a plan never make an attempt. We sought to expand upon existing research by examining how nocturnal panic relates to suicidal ideation, plans, and attempts separately. We predicted nocturnal panic would be associated with more suicidal ideation, plan, and attempt history than daytime only panic and no panic. Participants recruited from an online community sample were thoroughly screened for nocturnal and daytime panic history and completed questionnaires about past suicidal ideation, plans, and attempts. Nocturnal and daytime panic groups did not differ in past suicidal ideation or plans, but both groups exceeded the non-panic group. The nocturnal panic group reported more suicide attempts than the daytime and non-panic groups and judged themselves as more likely to make an attempt in the future. These results indicate a promising avenue for future research and suicide prevention efforts.