Table 3.

Point-biserial correlations between hypothesized predictors and episodes of PTSD or MD during 2 years of training, and partial correlations controlling for psychiatric and trauma history

	Episode of PTSD during 2 years of training		Episode of MD during 2 years of training
Baseline measure	Zero-order point-biserial correlation (n = 386)	Partial correlation, controlling for psychiatric history and trauma exposure	Zero-order point-biserial correlation (n = 383)	Partial correlation, controlling for psychiatric history and trauma exposure
Psychiatric and trauma history
History of mental disorders (SCID)	0.231***		0.233***
Lifetime exposure to traumatic events at baselinea	0.057		0.127*
Exposure to traumatic events from baseline to 2-year follow-up	0.032		0.113*
Demographics
Age	0.093	0.084	0.093	0.075
Gender	0.066	0.067	0.044	0.080
Ethnic minority	0.018	0.026	−0.011	−0.007
Years of full-time education	−0.012	−0.008	0.036	0.048
In long-term relationship	−0.100	−0.087	−0.033	−0.024
Psychological traits
Trait dissociation	0.185***	0.130*	0.216***	0.164**
Neuroticism	0.202***	0.139**	0.241***	0.189***
Anxiety sensitivity	0.146**	0.091	0.141**	0.092
Cognitive risk factors
Perceived resilience to stress	−0.153**	−0.120*	−0.227***	−0.210***
Negative attitudes towards emotional expression	0.105*	0.076	0.103*	0.066
Depressive attributions	0.162**	0.103*	0.216***	0.163**
Maladaptive post-traumatic cognitionsa	0.219***	0.156**	0.233***	0.165**
Cognitive responses to stressful memories
Suppression	0.176***	0.125*	0.098	0.049
Rumination	0.243***	0.186***	0.241***	0.180***
Intentional numbing	0.203***	0.139**	0.192***	0.122*
Styles of coping with stress
Substance usea	0.011	−0.035	0.135**	0.091
Behavioural disengagement	0.163**	0.128*	0.190***	0.153**
Wishful thinking	0.119*	0.066	0.219***	0.186***
Social support
Perceived social support (family and friends)	−0.198***	−0.154**	−0.235***	−0.182***
Perceived social support (work)	−0.154**	−0.123*	−0.193***	−0.164**

PTSD, Post-traumatic stress disorder; MD, major depression; SCID, Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, fourth edition.

^aVariable was square-root transformed.

* p < 0.05, ** p < 0.01, *** p < 0.001.