rehab-lab

Chart data — Essay 10, “The Most Expensive Steps”

Extracted from the essay’s own page source (p3-snap.html working copy of jonnybyrne.github.io/rehab-lab, expensive-steps view + its script block). No values were invented, rounded, or recalculated; every number below is byte-identical to a value already present in the file.

• Source: the essay page source itself (all figures trace to the studies listed in the essay’s Notes and full source list).
• Date accessed / extracted: 2026-10-11.
• Transformations: mechanical extraction only — JS object literals and the fare-schedule HTML table were converted to CSV rows with no arithmetic. The fare meter’s scroll mapping (1.0× at the top of the essay to 7.7× at the bottom) is computed in-page as 1 + 6.7 × scroll progress, not stored data, so it has no CSV.

Files

• room_dots.csv — the 1,000-tag room: 17 walker groups, each with dot count, fare multiple vs the intact walker, O₂ cost (mL/kg/m), walking speed, daily steps, and a short source label. Sums to exactly 1,000 dots.
• rate_cost_bars.csv — the rate-vs-cost toggle: per condition, O₂ rate (percent of normal per minute) and O₂ cost (multiple of normal per meter), low and high of the published range.
• fare_schedule.csv — the fare-schedule table rows: condition, detail text, and the low/high fare multiples.
• oxygen_budget_options.csv — the daily-oxygen-budget calculator menu: O₂ cost per option, default steps per day, source tag, and whether the default step count is an estimate (true where no published step data exist).
• feet_lists.csv — the 1970 vs 2025 prosthetic-feet lists: name, description, 2025 Medicare fee-schedule price (or “price not published”), and added/removed/remained status.

Caveats carried over from the essay

• The room is a modeled mix, not a census; condition shares are editorial estimates, and the stroke share of hemiplegic-gait walkers has no published headcount.
• The intact-walker baseline (~0.15 mL O₂/kg/m) is a textbook reference value, not a study result.
• Ranges are shown where studies disagree (transtibial 1.0–1.6× across four studies), never averaged.
• The hip-disarticulation figures have no entry in the essay’s source register and are flagged for verification against the primary literature.
• The 1970 SACH price was never published; the list says “price not published” instead of inventing one.