-The main difference between ASD and PTSD is time.
-To diagnose PTSD the symptoms have to be present for at least 1 month.
-There is a spectrum of trauma-related disorders from adjustment disorder(AD) to PTSD. ASD is in the middle of AD and PTSD.
Symptoms include intrusion, negative mood, dissociation, avoidance, and arousal
Adjustment disorder is less severe than ASD and involves either a less traumatic or threatening inciting event and/or less severe symptoms that do not meet DSM-5 criteria for ASD.
References
Am Fam Physician 2012;86(7):643-649.
DSM-V