Table 1. Key differences in diagnostic criteria for autistic disorder (DSM IV based INDT ASD tool) and ASD DSM-5 based AIIMS modified INDT ASD tool.

Parameter	DSM-IV based INDT ASD tool	DSM-5 based AIIMS modified INDT ASD tool
Social interaction	4 Subdomain (A1a, A1b, A1c, A1d)	3 Subdomain (A1a, A1b, A1c)
Social communication	4 Subdomain (A2a, A2b, A2c, A2d)
Restrictive and repetitive behaviour	4 Subdomain (A3a, A3b, A3c, A3d)	4 Subdomain (A2a, A2b, A2c, A2d)
Sensory symptoms	Absent	Present (1 item) out of 4 items in restrictive repetitive behaviour (A2d)
Impairment of daily functional activity	Absent	Present (1 item: Section B, Question 4)
Total number of items	12	9
Diagnosis of ASD	6 out of 12 criteria for diagnosis of autistic disorder	7 out of 9 criteria needed for diagnosis of ASD

DSM: Diagnostic statistical manual; INDT: International Clinical Epidemiology Network tool for autism spectrum disorder; ASD: Autism spectrum disorder; AIIMS: All India Institute of Medical Sciences