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u/transit_variance

The mean does not matter. The 90th percentile is what melts your ice pack.

member · joined 6 Nov 2024

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Overview — page 2 of 3

comment on excursion — 20 things I got wrong before I got it right in c/coldchain · 27 points · 6 months ago

I would not freeze it in solution. That is a different failure mode and a worse one.

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comment on [Meta] proposal — a flair for packaging posts in c/coldchain · 405 points · 6 months ago

Gel packs are designed for a duty cycle. A liquid pack at the end of a longer-than-expected transit is a pack behaving as specified, not evidence of an excursion in the vial.

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comment on unpopular opinion: most of what gets said here about EMS is guesswork in c/intlshipping · 335 points · 7 months ago

Merged into the standing thread for that lane so the reports accumulate in one place.

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comment on [Discussion] the lane advice in here is 2 years out of date in c/intlshipping · 19 points · 7 months ago

Packaging is assessable on arrival with no equipment: rigid outer, no movement inside, the cold element sized to the transit rather than to the box.

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comment on stability is the most under-discussed thing on this board in c/coldchain · 49 points · 8 months ago

Which lane, and had it been quoted at that transit time?

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comment on [Discussion] we are measuring dose stretching at the wrong time and calling it noise in c/maintenancephase · 54 points · 8 months ago

Yes. The habits have to outlive the dose or the maintenance phase is just a countdown.

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comment on [Question] how do you actually verify carrier in c/intlshipping · 267 points · 9 months ago

Why this board reports by lane and not by supplier.

Two members ordering from the same operation, in the same month, can see completely different transit times because they are on different routes with different carriers and different clearance points. Averaging them produces a supplier-level number that predicts nothing for either of them.

A lane — origin, destination, carrier, month — is the smallest thing that behaves consistently enough to be worth measuring. Once a route has a dozen reports behind it the median is genuinely useful, and that is what the tables on the source pages are built from.

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comment on [Discussion] the packaging advice in here is 3 years out of date in c/coldchain · 14 points · 9 months ago

A transit temperature logger records a distribution, and time above a threshold matters as much as peak temperature. That is the argument for logging rather than guessing.

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comment on [Meta] the data logger rule is doing its job and people should stop complaining in c/coldchain · 1 points · 10 months ago

insulation buys hours, not days

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comment on unpopular opinion: most of what gets said here about carrier is guesswork in c/intlshipping · 17 points · 11 months ago

summer and winter are different lanes with the same name

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comment on [Results] 51 weeks on 1.7mg, full numbers, ask me anything boring in c/bloodwork · 213 points · 11 months ago

Substantial weight loss independently moves lipids, liver enzymes and several other markers. Attributing a change to a compound while losing weight is confounded by design.

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comment on [PSA] stability is not what most of this community thinks it is in c/coldchain · 27 points · 11 months ago

This. A liquid gel pack on arrival tells you about the pack’s duty cycle, not about the vial.

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comment on [PSA] stability is not what most of this community thinks it is in c/coldchain · 248 points · 11 months ago

You cannot infer potency from a temperature record. The record tells you what happened to the box; only a test tells you what happened to the material.

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comment on [Meta] proposal — a flair for transit time posts in c/intlshipping · 114 points · 11 months ago

reship policy in writing before you order

Disagreeing with this bit: a single slow shipment does not move a lane, it joins the distribution.

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comment on Spain: data logger, and what it actually costs here in c/coldchain · 104 points · 11 months ago

write the reconstitution date on the vial

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comment on [Vendor] BCH order #17 — Germany, 12 days, no drama, receipts inside in c/intlshipping · 71 points · 1 year ago

Merged into the standing thread for that lane so the reports accumulate in one place.

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comment on [Discussion] ferritin is doing more work than we give it credit for in c/bloodwork · 4 points · 1 year ago

Do you have a baseline from before you started?

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comment on [Question] long term — what am I missing here in c/maintenancephase · 82 points · 1 year ago

a few kilos of drift is not a relapse

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comment on [Discussion] we are measuring data logger at the wrong time and calling it noise in c/coldchain · 1 points · 1 year ago

ask which lines are held in regional stock before you order in July

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comment on [Meta] the shipping rule is doing its job and people should stop complaining in c/intlshipping · 306 points · 1 year ago

Merged into the standing thread for that lane so the reports accumulate in one place.

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comment on three years of shipping threads, summarised so you do not have to read them in c/intlshipping · 22 points · 1 year ago

Asked for the month rather than removing. Without it the report cannot be compared to anything.

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comment on help me understand carrier, I have read the wiki twice in c/intlshipping · 77 points · 1 year ago

Left up and added to the lane table. All four required fields were present, which is rarer than it should be.

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comment on packaging is the most under-discussed thing on this board in c/coldchain · 15 points · 1 year ago

Moved everything off the fridge door after reading a thread here and my temperature log immediately got boring.

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comment on [Question] DHL — what am I missing here in c/intlshipping · 18 points · 1 year ago

no tracking numbers, ever

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comment on how much of what we believe about ferritin actually comes from bloodwork threads in c/bloodwork · 520 points · 1 year ago

Time of day, fasting state, hydration and recent exercise all move common markers. Standardising the draw conditions is free and it removes most of the apparent variability.

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comment on [Discussion] the packaging advice in here is 2 years out of date in c/coldchain · 22 points · 1 year ago

ask which lines are held in regional stock before you order in July

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comment on [Discussion] the packaging advice in here is 2 years out of date in c/coldchain · 49 points · 1 year ago

You cannot infer potency from a temperature record. The record tells you what happened to the box; only a test tells you what happened to the material.

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comment on [Question] how do you actually verify DHL in c/intlshipping · 7 points · 1 year ago

the last mile is where most of the variance lives

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comment on three years of long term threads, summarised so you do not have to read them in c/maintenancephase · 31 points · 1 year ago

Not convinced. Interval stretching changes your exposure profile, not just the total, and the two are not equivalent.

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comment on reading ALT threads from 2024 and half of it aged badly in c/bloodwork · 7 points · 1 year ago

Reference intervals are typically the central 95% of a reference population. By construction one person in twenty falls outside one on any given test without anything being wrong.

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comment on am I the only one who found maintenance harder than the injections in c/maintenancephase · 9 points · 1 year ago

Is the goal weight still the one you picked at the start?

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comment on help me understand lane, I have read the wiki twice in c/intlshipping · 465 points · 1 year ago

A lane is an origin, a destination, a carrier and a season. Change any one and the distribution changes, which is why supplier-level shipping averages are close to meaningless.

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comment on [Question] New Zealand — has anyone got a straight answer on lyophilised in c/coldchain · 5 points · 2 years ago

Was there a logger in the box?

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comment on what would you tell week-1 you about ferritin in c/bloodwork · 2 points · 2 years ago

ApoB is the one worth adding if you only add one

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comment on my hs-CRP moved and I cannot work out whether dose stretching is why in c/maintenancephase · 53 points · 2 years ago

regain after stopping is the expected outcome, not a personal failure

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comment on [Meta] proposal — a flair for cold chain posts in c/coldchain · 19 points · 2 years ago

I would not freeze it in solution. That is a different failure mode and a worse one.

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comment on EMS is the most under-discussed thing on this board in c/intlshipping · 385 points · 2 years ago

Why this board reports by lane and not by supplier.

Two members ordering from the same operation, in the same month, can see completely different transit times because they are on different routes with different carriers and different clearance points. Averaging them produces a supplier-level number that predicts nothing for either of them.

A lane — origin, destination, carrier, month — is the smallest thing that behaves consistently enough to be worth measuring. Once a route has a dozen reports behind it the median is genuinely useful, and that is what the tables on the source pages are built from.

permalink

comment on EMS is the most under-discussed thing on this board in c/intlshipping · 263 points · 2 years ago

Merged into the standing thread for that lane so the reports accumulate in one place.

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comment on [Discussion] can we stop arguing about ApoB until somebody posts a number in c/bloodwork · 53 points · 2 years ago

Repeat testing before acting is standard practice for a reason: regression to the mean does a lot of work on single outlying values.

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