Endpoint · computePOSTapi.magentlab.com /api/calc/grobman_vbac
Grobman 2007 first prenatal visit logistic probability of vaginal birth after cesarean from maternal age, prepregnancy BMI, caller-assigned ethnicity (african_american, hispanic…
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Grobman 2007 first prenatal visit logistic probability of vaginal birth after cesarean from maternal age, prepregnancy BMI, caller-assigned ethnicity (african_american, hispanic, or other), any prior vaginal delivery, prior VBAC after cesarean, and recurrent cesarean indication. Ethnicity uses the paper terms; magent does not assign race or ethnicity. Not the 2009/2010 admission model and not Grobman 2021. Not a trial-of-labor order.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.005 per call
Paid calls
none yet
delivery unknown until someone pays
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https://api.magentlab.com/api/calc/grobman_vbac
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first 29 days ago · last 16 hr ago
26 free handshakes
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Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.260 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by liveness · gap to 1.000 is 0.740: 0.307 uncertain ? + 0.433 short ? · 0.190 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 0.61 | 0.099 | 0.060 | −0.233 | −0.307 | |
| latency p95 it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.260 | gap to 1.000 = 0.740 · 0.433 short · 0.307 uncertain | 0.260 | −0.433 | −0.307 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.099 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.260 → UNRATED: 24 of 30 paid calls weights 2026.09.6 · 24 samples · seed cap_01M1RD9JMXB50JKNR893VK9ZGR|2026-09-03T08:36:32.642Z|2026.09.6
Verify it yourself
npx teppi-check https://api.magentlab.com/api/calc/grobman_vbaccurl -s https://api.teppi.xyz/v1/trust/cap_01M1RD9JMXB50JKNR893VK9ZGR