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Comorbidity guide
Sensory processing differences are so prevalent in autism that they were added as a diagnostic criterion in the DSM-5 (2013). Research consistently shows that over Rate unavailable; the cited research populations and methods differ of autistic individuals experience atypical sensory responses — hypersensitivity, hyposensitivity, or sensory seeking across one or more domains (auditory, visual, tactile, olfactory, gustatory, proprioceptive, vestibular, interoceptive). These differences profoundly impact daily functioning, from eating and dressing to learning and social participation.
These guides sit within Ontario's autism funding system. The May 13, 2026 OAP administrative snapshot reports 91,974 registered children. A separate Ontario Autism Coalition July 2026 community-reported invitation cohort describes a five-year-plus signal; Ontario does not publish an official average wait.
A comprehensive meta-analysis by Ben-Sasson et al. (2019) found that over Rate unavailable; the cited research populations and methods differ of autistic individuals exhibit clinically significant sensory processing differences, compared to approximately 5-Rate unavailable; the cited research populations and methods differ of the general population. The most commonly affected domains are auditory processing (hypersensitivity to noise), tactile processing (aversion to textures or touch), and proprioceptive processing (difficulties with body awareness and movement planning).
Autistic individuals typically show a mixed sensory profile rather than uniform hyper- or hyposensitivity. A child might be hypersensitive to sounds (covering ears in noisy environments) while simultaneously seeking proprioceptive input (crashing into furniture, seeking deep pressure). Understanding the individual's specific sensory profile is essential for effective intervention and accommodation.
The Sensory Profile 2 (Dunn, 2014) is the most widely used assessment tool in Ontario. It maps an individual's responses across four sensory processing patterns: seeking, avoiding, sensitivity, and registration. This profile guides intervention planning and environmental modifications.
Occupational therapy may help with sensory processing differences. Ask whether the therapist uses a sensory integration approach, how goals are measured, and what evidence supports the plan.
Environmental modifications are equally important and often more immediately impactful. These include: noise-reducing headphones for auditory sensitivity, weighted blankets or vests for proprioceptive input, fidget tools for sensory seeking, modified lighting for visual sensitivity, and designated quiet spaces for sensory breaks.
In Ontario, ask about occupational therapy through the Ontario Autism Program, school boards, community clinics, and Children's Treatment Centres. Publicly funded waits vary by provider and region.
Ben-Sasson, A. et al.
Update of a Meta-Analysis of Sensory Symptoms in ASD. Journal of Autism and Developmental Disorders, 2019; 49(4):1621-1636
Schoen, S.A. et al.
Systematic review of Ayres Sensory Integration intervention for autistic children (Schoen et al.)
Sensory processing disorder (SPD) is not a standalone diagnosis in the DSM-5 or ICD-11. In autistic individuals, sensory differences are considered part of the autism diagnosis under the criterion "hyper- or hypo-reactivity to sensory input." However, the clinical presentation requires specific assessment and intervention regardless of diagnostic categorization.
Sensory profiles often shift over time. Some sensitivities may decrease with maturity, intervention, and accommodation strategies, while others may persist or new patterns may emerge, particularly during puberty. Most autistic adults continue to experience sensory differences but develop coping strategies that improve daily functioning.
Many Ontario schools provide sensory spaces or quiet rooms, particularly schools with Autism Spectrum Disorder classes. For students in regular classrooms, sensory accommodations can be documented in the Individual Education Plan (IEP). Request a school-based OT consultation to recommend specific environmental modifications for your child.
Next Steps
Families navigating autism services in Ontario face a documented multi-year wait. Here is the Ontario data — and a two-minute way to push back, when you are ready.
Related Resources
How long does autism diagnosis take in Ontario?
VerifiedBefore joining the OAP waitlist, Ontario diagnostic waitlists average 12–24 months at public hospitals. This pre-waitlist delay means total time from first concern to therapy often exceeds 5–7 years, an invisible bottleneck in official statistics.
Source: Ontario Autism Program [OAP] · Verify Link
Is private autism assessment faster in Ontario?
VerifiedPrivate autism assessments cost $2,500–$4,000 but reduce wait times from years to weeks. Many families face the choice of paying out-of-pocket to access the OAP sooner or waiting while their child misses the critical early intervention window.
Source: Ontario Autism Program [OAP] · Verify Link
How long do families wait for Ontario autism services?
VerifiedOntario autism wait times for core clinical services now exceed 5+ years (Ontario Autism Coalition, July 2026). Funding invitations are currently reaching families who registered in August 2021 (Ontario Autism Coalition, July 2026 (reported from community intake)). This delay far exceeds the sensitive early intervention window recommended by developmental specialists.
Source: MCCSS FOI via OAC · Mar 2026, FAO Report 2024 · Verify Link
How many children are on the Ontario autism waitlist in 2026?
VerifiedAs of May 13, 2026, 91,974 children are registered with the Ontario Autism Program. However, only 20,711 (22.5%) have an active Core Funding Agreement. This represents ~300% growth in registrations since 2019, with 71,263 children still waiting for essential funding.
Source: MCCSS FOI via OAC · Mar 2026, FAO Report 2024 · Verify Link