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The evidence gap

7 / 43 studies state whether the plant was fresh or dried

7 / 43studies that prepared the plant state whether it was fresh or dried · 16% (95% interval 8%–30%)
descriptive · not a hypothesis test

How often each preparation detail is stated

Solid = stated · hatched = not stated (unknown) · whisker = 95% interval. Hover, focus or tap a bar for n.

Order
  1. Filtration5/43 · 12%

    Sensitivity check (provisional): not computed: filtration was not part of the provisional check

  2. Fresh or dried7/43 · 16%

    Sensitivity check (provisional): 19% (95% interval 8%–30%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 11 stated by the extractor, 11 by the second coder.

  3. Heat11/43 · 26%

    Sensitivity check (provisional): 24% (95% interval 14%–35%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 12 stated by the extractor, 12 by the second coder.

  4. Plant part21/43 · 49%

    Sensitivity check (provisional): 49% (95% interval 33%–66%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 16 stated by the extractor, 20 by the second coder.

  5. Solvent(inflated)37/43 · 86%

    Sensitivity check (provisional): 79% (95% interval 62%–93%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 20 stated by the extractor, 22 by the second coder.

    Solvent share is inflated by construction. A study counts as having prepared the plant partly because a solvent was stated, so this share is higher than it would be among all studies that prepared the plant.

None of the five stated: 2 of 43 · 5% (95% interval 1%–15%)

View as table
Preparation details stated by modern studies that prepared the plant (95% Wilson interval)
DetailStatedStudies (n)Proportion95% intervalSensitivity check (provisional)
Filtration54312%5%–24%not computed: filtration was not part of the provisional check
Fresh or dried74316%8%–30%19% (95% interval 8%–30%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 11 stated by the extractor, 11 by the second coder.
Heat114326%15%–40%24% (95% interval 14%–35%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 12 stated by the extractor, 12 by the second coder.
Plant part214349%35%–63%49% (95% interval 33%–66%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 16 stated by the extractor, 20 by the second coder.
Solvent (inflated by construction)374386%73%–93%79% (95% interval 62%–93%) if the extractor's error rates from the provisional check applied. On the 40 checked studies: 20 stated by the extractor, 22 by the second coder.
None of the five stated2435%1%–15%Not computed

Prepared set: the 43 studies that prepared the plant material (audit v2 eligibility). "Stated" means the rule-based extractor coded a value (heuristic; checked only against a second coding of a study sample). 95% Wilson intervals. Descriptive findings, not hypothesis tests. Source: data/interim/m5/reporting_gap.json.

Other study sets

  • Every coded study retrieved for a plant–use pair (audit v1): none of the five stated131 of 303 · 43% (95% interval 38%–49%)
  • Heat stated · studies coded from abstracts9 of 241 · 4% (95% interval 2%–7%)
  • Heat stated · studies coded from open-access methods28 of 62 · 45% (95% interval 33%–57%)
  • Compared two preparations of the same plant material (pre-registered v3 screening)6 of 257 · 2% (95% interval 1%–5%)

When they did say, did it match the recipe?

Audit v2 · pre-registered re-analysis after v1's design flaw. Small n: only 11 (plant–use pair, study) units have a known status; 32 are unknown and 4 have no modern analogue. Too few to estimate a field-wide rate. Audit v1 (as pre-registered, with its design flaw) is in Methods & data.

9 plants · 35 units
Solvent= 2 · ≠ 5 · ? 27 · no analogue 1
Heat= 0 · ≠ 2 · ? 33
Filtration= 3 · ≠ 0 · ? 32
View as table
Culpeper 1652: studies vs the recipe (audit v2)
DetailSameDifferentNot statedNo modern analogue
Solvent25271
Heat02330
Filtration30320
9 plants · 35 units
Solvent= 2 · ≠ 5 · ? 27 · no analogue 1
Heat= 0 · ≠ 2 · ? 33
Filtration= 3 · ≠ 0 · ? 32
View as table
Culpeper 1850: studies vs the recipe (audit v2)
DetailSameDifferentNot statedNo modern analogue
Solvent25271
Heat02330
Filtration30320
4 plants · 16 units
Solvent= 2 · ≠ 3 · ? 8 · no analogue 3
Heat= 0 · ≠ 0 · ? 16
Filtration= 0 · ≠ 1 · ? 15
View as table
Pliny: studies vs the recipe (audit v2)
DetailSameDifferentNot statedNo modern analogue
Solvent2383
Heat00160
Filtration01150
Same as the recipeDifferentNot statedNo modern analogue
Every study, field by field →