Prospective prediction of PTSD diagnosis in a nationally representative sample using machine learning

Worthington, Michelle A.; Mandavia, Amar; Richardson-Vejlgaard, Randall

doi:10.1186/s12888-020-02933-1

BMC Psychiatry

Table 2 Distribution and relative influence of significant variables

From: Prospective prediction of PTSD diagnosis in a nationally representative sample using machine learning

	Risk Factors	No PTSD Diagnosis (n = 31,868)		PTSD Diagnosis (n = 2785)		Chi-square Value	Relative Influence ^a
	Risk Factors	n	%	n	%
DSM-IV Diagnosis	Major depressive episode, lifetime	6287	19.73	1653	59.35	2274.6*	10.38
	Major depressive episode, since last interview	2513	7.89	1060	38.06	2518.5*	17.29
	Major depressive episode, since last interview, before past year	1728	5.42	766	27.50	1866.5*	0.19
	Manic episode, since last interview	519	1.63	343	12.32	1201.6*	0.19
	Mood disorder total						28.05
	Generalized anxiety disorder, lifetime	1897	5.95	833	29.91	2022.2*	1.97
	Generalized anxiety disorder, since last interview	966	3.03	584	20.97	1924.6*	1.40
	Generalized anxiety disorder, past year	844	2.65	519	18.64	1728.2*	0.08
	Panic disorder with Agoraphobia, since last interview	156	0.49	191	6.86	1041.5*	0.09
	Social Phobia, since last interview	698	2.19	371	13.32	1057.7*	0.07
	Specific phobia, since last interview	2237	7.02	739	26.54	1240*	1.01
	Specific phobia, past year	2069	6.49	689	24.74	1161.6*	0.38
	Anxiety disorder total						5.0
	Schizotypal Personality Disorder, Lifetime	984	3.09	550	19.75	1676.5*	0.41
	Borderline personality disorder, lifetime	1409	4.42	822	29.52	2673.3*	47.92
	Personality disorder total						48.33
Trauma Exposure	Ever stalked by anyone	1523	4.78	579	20.79	1138.2*	0.11
	Other than terrorist attack, ever have someone close to you die unexpectedly	12,413	38.95	1766	63.41	618.83*	0.07
	Ever sexually assaulted, molested, raped, or experienced unwanted sex	2387	7.49	941	33.79	2017.3*	17.61
	Physically attacked/beaten/injured before age 18 by parent/caretaker	913	2.86	407	14.61	952.95*	0.09
	Seriously neglected before age 18 by parent/caretaker	818	2.57	377	13.54	914.18*	0.08
	Ever physically attacked/beaten/injured by spouse or romantic partner	1864	5.85	709	25.46	1414.6*	0.66
	Traumatic exposure total						18.62

* p < 0.0001, ** p < 0.001
^a Relative influence is reported as percent influence

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