Calvin Heal @CalvinHeal1

A second point in the recent Nature Human Behavior editorial nature.com/articles/s4156… is to adhere to threshold interpretations. Do not use ‘marginally significant’. A finding is significant, or not. But why would scientists make dichotomous claims?

Kind reminder. There is no such thing as a validated prediction model bmcmedicine.biomedcentral.com/articles/10.11…

A #StataTip: If you are repeatedly using the same set of commands, for example for graphs or regressions, then: 1) start using macros, and/or 2) define small programs This saves you: (a) space, and (b) the hassle of copy/pasting and looks neater!

Want to clean up your @Stata data more efficiently (& carefully)? Generating, recoding, & rescaling variables is a crucially important part of data analysis--yet it's hard to find a succinct guide. I've created one for my students & thought I'd share!😁 drive.google.com/file/d/1bBVAHJ…

#MethodMonday 2: This week I'm sharing @statsepi s excellent post on balancing of variables in RCTs statsepi.substack.com/p/out-of-balan… A common misconception is that we randomise to 'balance' baseline variables (incorrectly termed confounders) - we don't 1/..

Want to have nicer scatterplots in @Stata? Students often ask me how to adjust individual labels & clean up overlapping/cluttered labels. So, I finally decided to make a guide w/ every possible fix that I'm aware of: dropbox.com/s/389v5a18zu89… Hope it's helpful for you!🙂

We have updated our Stata Graph Gallery. Now over 160 graphs! New features include: search across all the graphs, select by complexity, or select by graph type. Check it out at surveydesign.com.au/stata/graphs.h…

Quick @Stata tip (ICYMI): keep if inlist(state, "AL", "AK", "AZ") is the same as: keep if state=="AL" | state=="AK" | state=="AZ" And: keep if inrange(distance, 10, 91) is the same as: keep if distance>=10 & distance<=91

Quick @Stata tip: use "restore, not" to fix the "already preserved" error that arises if you try to preserve the data when already preserved.

No matter what you were taught, don't bother to test for proportional hazards in survival analyses. Hazards are never proportional because hazard ratios vary over the follow-up if treatment has an effect on survival. @mats_julius and I explain it here: jamanetwork.com/journals/jama/…

“The association between temperature, heart rate, and respiratory rate in children aged under 16 years attending urgent and emergency care settings” : our latest publication on children’s emergency physiology journals.lww.com/euro-emergency… @UoS_HealthSoc @MFT_Research #child #health

Quick @Stata tip: use "ereplace" to replace when using "egen" commands: *typical way: sysuse auto2, clear *doesn't work: replace mpg = max(mpg) *instead: egen mpg2 = max(mpg) drop mpg rename mpg2 mpg *better way: ssc install ereplace sysuse auto2, clear ereplace mpg = max(mpg)

Quick @Stata tip: get rid of the leading and trailing space of a string variable with "trim": clear all input str12 str "String A " " String B " " String C" end replace str = trim(str) compress

Quick @Stata tip: when using bysort, say you have a variable you want to sort with, but *not* group by. Put this variable in parentheses: sysuse census, clear *keep least-populous state within each region, so sort by pop within each region: bys region (pop): keep if _n==1

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Well @TUIUK As promised here's another photo from the room I had to endure last week. It's a bath mat! Why was I not moved? Why am I not being refunded? #TUIfails #badcustomerservice @TUIGroup @WhichUK #poorcustomerservice #MartinLewis @TUIUKPR

"These standard double rooms come with a balcony or terrace with a garden view" Really @TUIUK ? #badcustomerservice @TUIGroup @WhichUK #poorcustomerservice #MartinLewis

Nice paper. (Some of?) the most important statistical ideas in past 50 years tandfonline.com/doi/full/10.10…

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