Trauma & recovery

Most People Do Not Develop PTSD, and That Matters

Trauma exposure is common. PTSD is not. Understanding the gap between those two facts changes what you conclude about yourself.

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Two numbers

In the National Comorbidity Survey, a representative sample of nearly six thousand Americans, the estimated lifetime prevalence of PTSD was 7.8 percent, while exposure to a traumatic event was reported by the majority of respondents (Kessler et al., 1995). Most people who go through something terrible do not go on to develop the disorder.

This is not a small statistical footnote. It is the finding that most changes how people understand their own situation.

Why this cuts both ways

Read one way, it is reassuring. Most people recover without formal treatment. Bonanno (2004) argued that resilience after loss and potentially traumatic events is not rare or pathological but the most common trajectory, and that the field had systematically underestimated it.

Read another way, it is a problem. If most people are fine and you are not, the obvious private conclusion is that something is wrong with you specifically. That conclusion tends to arrive quietly and go unchallenged for years.

What actually predicts who develops PTSD

The honest answer is that it is not about strength. Brewin and colleagues (2000) meta-analysed fourteen risk factors across seventy-seven studies. What they found was that pre-trauma characteristics such as gender, age and education had modest and inconsistent effects, and that the strongest and most consistent predictors were things like psychiatric history, reported childhood abuse and family psychiatric history, along with factors operating during and after the event: the severity of the trauma, the amount of additional life stress, and, notably, the lack of social support afterwards.

That last one deserves attention. One of the more powerful predictors of whether a person develops PTSD is not something about them at all. It is what happened around them afterwards, and whether anyone was there.

What follows from this

Three things worth taking from the research.

• Not developing PTSD is common, so having it is not evidence that you are weaker than the people who did not.
• The risk factors that matter most are largely historical or circumstantial, which means they say something about your life rather than about your character.
• Social support after the event is one of the strongest modifiable factors, which is a reason to treat isolation as a clinical issue and not a personality trait.

The statistic that most people recover is often offered as comfort. It is more useful as an argument against the private conclusion people draw when they are the exception.

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