ADHD or Anxiety? A Symptom-by-Symptom Comparison Chart

You cannot sit still in meetings. You lie awake replaying the day. You put off an email for a week, then write it in four minutes. Any of that could be ADHD. Any of it could be anxiety. Quite a lot of it could be both.

The ADHD vs anxiety question is one of the most common reasons adults in Canada book an assessment, and one of the hardest to settle from a list of symptoms, because the two conditions share so much surface. What they do not share is the pattern underneath.

This chart is built to show that pattern. It will not tell you which one you have. It will help you describe what you notice precisely enough that a clinician can.

Why the two get confused so often

Both disrupt attention. Anxiety fills working memory with worry, so there is less room left for the task. ADHD leaves working memory leaky in the first place. Both produce restlessness, poor sleep, irritability, avoidance and the feeling of never catching up. And each can cause the other. Years of missed deadlines are a reasonable thing to feel anxious about, and chronic anxiety makes anyone scattered.

Add a third complication. Standard screening questionnaires ask about the symptom, not the cause. I have trouble concentrating scores the same whether you are worrying about your mortgage or lost the thread because a bird flew past the window. That is why self-screening tends to point at both conditions at once, and why we wrote signs of ADHD mistaken for other conditions.

The chart: restlessness, focus, sleep, avoidance and worry

Read each row as the shape the problem tends to take, not a rule. With ADHD, these difficulties are usually about regulating attention and activity, and have been there in some form since childhood. With anxiety, they are usually driven by threat, by worry that something will go wrong, and they rise and fall with that worry.

• Restlessness. ADHD pattern: fidgeting and needing to move whether or not anything is wrong, like an engine idling. Anxiety pattern: muscle tension and feeling keyed up, tied to a specific worry, easing when the worry resolves.
• Trouble focusing. ADHD pattern: attention drifts toward whatever is more interesting, even during pleasant, low-stakes tasks, and locks on hard when something is engaging. Anxiety pattern: attention is pulled toward the threat, and focus is fine on a calm day.
• Sleep. ADHD pattern: trouble winding down, a second wind at 11 p.m., an irregular schedule, often a naturally late body clock. Anxiety pattern: lying in bed running scenarios, waking at 3 a.m. with racing thoughts about particular things.
• Avoidance. ADHD pattern: tasks get avoided because they are boring, long or unclear where to start, and often slip out of mind altogether. Anxiety pattern: tasks get avoided because of fear of the outcome or of judgment, and the task is remembered constantly.
• Worry. ADHD pattern: worry arrives after a consequence (the missed bill, the forgotten birthday), fades fast, and does not prevent the next miss. Anxiety pattern: worry arrives before, is about possible futures, is hard to switch off and often out of proportion.
• Forgetfulness. ADHD pattern: losing the keys mid-thought, missing appointments even in calm weeks. Anxiety pattern: lapses cluster in high-stress periods and improve when life settles.
• Impulsivity. ADHD pattern: blurting, interrupting, spontaneous spending, fast decisions regretted later. Anxiety pattern: over-deliberating, difficulty deciding at all, seeking reassurance before acting.
• Physical symptoms. ADHD pattern: few, beyond fidgeting. Anxiety pattern: racing heart, tight chest, stomach upset, sweating, sometimes panic attacks.

Timing clues: lifelong versus situational

The chart gets much more useful when you add time. Three questions do most of the work.

1. When did it start? ADHD is a neurodevelopmental condition, and clinicians look for several symptoms present before age 12, even if nobody called them that at the time. Anxiety can begin at any age and often has a recognisable trigger: a new job, a loss, a move, a health scare.
2. What does it track? ADHD symptoms tend to stay roughly level across good and bad months, and get worse with boredom and repetition. Anxiety symptoms tend to track stressors and ease on a real holiday.
3. What happens in a quiet, low-stakes week? If the restlessness, drifting and forgetting carry on when nothing is at stake, that leans toward ADHD. If a quiet week is a genuinely different experience, the anxiety column deserves a closer look.

School report cards are surprisingly good evidence here. Comments like bright but does not apply himself or talks too much, work unfinished from grade three are a timeline anxiety usually does not produce.

When both are present at once

Both at once is common, not an edge case. Many adults with ADHD develop anxiety partly as a response to years of ADHD consequences, and the two then feed each other. We cover how that looks in can you have ADHD and anxiety at the same time.

The tell is usually in what the worry is about. If the anxious thoughts are about ADHD things (did I send that, did I lock the door, what have I forgotten this time), the anxiety may be sitting on top of attention problems rather than causing them. In that case the rows in the chart tend to split: restlessness and forgetfulness match the ADHD column, worry and physical symptoms match the anxiety column. That split is worth writing down, because it is exactly what a clinician wants to see.

What a clinician looks at that a chart cannot show

A chart compares symptoms. An assessment compares histories. A clinician assessing ADHD when anxiety is also in the picture will typically look at:

• Childhood history, ideally with a parent, older sibling or old report cards as a second source.
• Whether symptoms show up across settings: work, home, relationships, driving, money.
• The order of onset. Which came first, the attention problems or the worry.
• Rule-outs that mimic both, including thyroid problems, sleep apnea, substance use and other mental health conditions.
• Validated rating scales, read in context rather than as a score on their own.

None of that is available to a questionnaire, which is why online self-tests so often come back positive for everything. More on what gets missed in coexisting conditions that mask ADHD symptoms.

Using the chart to prepare for an assessment

Here is how to turn the chart into something a clinician can use in a 60-minute appointment.

1. Go row by row and pick the column that fits better. Where both fit, say so. Honest ambiguity is more useful than a tidy answer.
2. Write down three specific childhood examples, with rough ages. Lost library books, a teacher's comment, the homework that never got handed in.
3. Sketch a timeline of the last five years. Mark when things were worse and what was happening in your life at the time.
4. Ask one person who knew you before 12 what they remember. A two-line text is enough.
5. Bring all of it to the appointment. Your family doctor can start the conversation, or you can book directly with an online clinic.

Finding Focus provides online ADHD assessment and treatment for adults and teens in several Canadian provinces: a short online intake, then one consultation with a licensed Canadian clinician, with no referral needed. You can read how the process works on our ADHD services page. Whichever column your chart leans toward, the goal of the appointment is the same: a clear picture of what is driving the symptoms, so that whatever comes next is aimed at the right thing.