# Codebook: FDA reports on tilt-in-space and reclining wheelchairs

Written before any report in the set was coded. Mobility Atlas study, October 2026.

## Pool
FDA MAUDE device reports filed under product code IOR (Wheelchair, Mechanical) or ITI (Wheelchair, Powered) whose text contains "tilt in space", "tilt-in-space", "power tilt", "tilt system", "tilt function", "tilt actuator", "tilt module", "tilt mechanism", "space tilt", "recline", "reclining" or "power recline", read in openFDA on 22 October 2026: every such report received before 2011 or from 2016 on, and a systematic sample of 200 of the 1,118 received from 2011 to 2015.

## What you record for each report
One line per report: `report_key,device,seating,problem,injury,fall,user,finding,note`

### DEVICE (one letter): the chair the report is about
- P: a POWER WHEELCHAIR.
- M: a MANUAL WHEELCHAIR (including manual tilt-in-space and reclining chairs and attendant-propelled chairs).
- O: another device.
- N: no event.

### SEATING (y or n)
- y: the event involves the chair's tilt, recline or seat-elevation function, or the parts that do it (actuator, gas spring, release cable or handle, tilt or recline frame, seating module, seating switch).
- n: tilt or recline is only mentioned (for example the chair has it), and the event is about something else.

### PROBLEM (one letter): what the report says went wrong FIRST (code the allegation even if the maker found no fault). If several apply, use the first in this list.
- P: PINCHED, CAUGHT OR TRAPPED: a body part caught, pinched or crushed by the moving seat, back, elevator or leg rest, or the user trapped in a position.
- A: TILT, RECLINE OR ELEVATE MECHANISM: actuator, motor, gas spring, cable, release handle or lock failed; seat stuck tilted, reclined or raised; would not tilt, recline or return; moved by itself, too fast or too far; seat or back dropped or flipped back.
- C: SEATING CONTROL OR ELECTRICAL: seating switch, module or wiring; smoke, fire, sparks or melting in the seating system.
- S: SEAT OR BACK STRUCTURE: seat frame, back canes, recline or tilt frame, bracket, bolt or weld broke, cracked, bent, loosened or wobbled.
- T: TIP OR FALL WITHOUT A FAULT ABOVE: the chair tipped over or the user fell or slid out, including while tilted or reclined.
- G: ANOTHER PART OF THE CHAIR: drive, motor, brakes, wheels, casters, joystick for driving, battery, leg rests, armrests, anything not in the seating system.
- U: BODY EVENT WITHOUT A FAULT that is not a fall: skin or pressure injury, positioning, breathing, pain, with no part said to have failed.
- Q: a device problem is alleged but no part or behaviour is named.
- X: an event is described but nothing failed and nothing above fits.
- N: no event.

### FLAGS (y or n)
- injury: harm to the body or medical care is stated (bruise, cut, fracture, burn, stitches, hospital, death; pain alone counts). y when the event type is Death.
- fall: the user fell or went to the ground, or the chair tipped over with the user.
- user: the report says the user or a third party caused it (misuse, wrong setup, a modification, an unapproved part, use against the instructions), as the cause or the maker's conclusion.

### FINDING (one letter): what the maker found
- D: a fault was found or confirmed, or a part was replaced because it was faulty.
- N: no fault found, worked as designed, or the cause was outside the device.
- X: not evaluated, not returned, or nothing stated.

### note
At most 15 words: chair, problem, what made it hard. No quotes longer than 6 words. No personal details.

## Output format
CSV with header `report_key,device,seating,problem,injury,fall,user,finding,note`, one row per report, nothing else.