Can you actually attribute a hoarding? Yes.

“We can’t measure it” is the reason most hospitals give for cutting outdoor. It is the wrong reason. A hoarding is no harder to attribute than a search ad. It just needs to be set up to be counted before it goes up, not after.

Here are six methods we use to tie hoardings, billboards, and outdoor to booked patients. Use two or three together and the channel stops being a leap of faith.

1. Give each hoarding its own phone number

A unique tracked number per hoarding is the single most reliable method. Every call to that number can only have come from that board. You get call volume, call times, call recordings, and a direct line from a specific location to a specific enquiry. Run one number on the hoarding at the Ranchi city entrance and a different number on the one near the bypass, and you will know within a week which location pulls.

2. Put a QR code and a vanity URL on the creative

A large, simple QR code turns a passive board into a clickable one. Scans are logged, timed, and traceable to the exact hoarding. Pair it with a short vanity URL for people who will not scan while driving but will type it later. Point both at a dedicated landing page so every visit is captured.

3. Build a dedicated landing page per campaign

Do not send hoarding traffic to your homepage, where it drowns in every other source. Send it to a page that exists only for that campaign. Now every visit, form fill, and call-back request on that page belongs to outdoor. You can watch traffic rise the week the board goes up and fall the week it comes down.

4. Ask every patient how they heard about you

Make “How did you hear about us?” a required field on the enquiry form and a scripted question at the front desk. Self-reported data is fuzzy for any single patient, but across hundreds of enquiries a clear signal emerges. When patients start saying “the big board near the flyover,” you have qualitative confirmation that quantitative tracking alone can miss.

5. Run a geo-lift test

This is the method that silences sceptics. Put hoardings up in one part of a city and leave a comparable area untouched. Then compare enquiries, branded searches, and direct calls between the two zones. The difference is the hoarding’s lift. You can also do this in time: measure a four-week baseline, run the boards for four weeks, and measure the change while holding your other channels steady.

A geo-lift test turns “we think the hoarding worked” into “enquiries in the covered zone rose 22 percent against a flat control.”

6. Watch the digital shadow

Outdoor leaves fingerprints online. When a hoarding goes live, branded search volume and direct-to-site traffic tend to rise in that catchment days later, because people see the board, then look you up. Track your branded search and direct sessions by city and you can see the offline board pushing digital demand. This is why crediting only the last click undervalues outdoor: the hoarding often started the journey that a search ad finished.

Put the methods together

No single method is perfect. A unique number misses the patient who searched instead of calling. Self-reported data is soft. Geo-lift needs discipline. Layer them and the gaps close:

• Direct response: unique number, QR code, vanity URL, dedicated landing page.
• Corroboration: “how did you hear about us,” front-desk script.
• Causal proof: geo-lift holdout, branded-search shadow.

Roll all of it up to one number, the same one you use everywhere: cost per booked patient. A hoarding that lowers your overall cost per booked patient is earning its place, whether or not every patient consciously credits it.

The takeaway

Hoardings are not unmeasurable. Unmeasured hoardings are a setup problem. Decide how you will count the board before you print it, wire in two or three of these methods, and outdoor becomes as accountable as any line in your plan. That is how offline earns a permanent seat at the table instead of being the first thing cut when budgets tighten.