Inane Observations $ sudo fix_it
  • Big list of medical abbreviations

    26 September 2022 (updated 21 February 2025) | medicine | Comment

    Just a big list of medical abbreviations. Note:

    • These abbreviations are based on Australian (and specifically Victorian) usage. Some abbreviations have other meanings elsewhere (e.g. BSL for British Sign Language).
    • The inclusion of a abbreviation here does not imply it is recommended to be used.
    … »
  • Custom fonts in KaTeX

    24 September 2022 (updated 24 September 2022) | mathematics katex | Comment

    KaTeX is a web-based mathematics typesetting library, similar to the erstwhile untouchable MathJax. Unfortunately, out of the box, KaTeX only supports one font, its default Computer Modern-based font, and does not have built-in functionality for customising this. Thankfully, it is not difficult to achieve… »

  • The urea:creatinine ratio in SI units

    20 September 2022 | medicine | Comment

    It is said that a high urea:creatinine ratio is an indicator of a pre-renal cause of acute kidney injury [1]. This is usually discussed in United States units, where urea is measured as blood urea nitrogen (BUN) in mg/dL, and creatinine in mg/dL. The… »

  • On the credible probability of confidence intervals

    13 September 2022 | mathematics statistics | Comment

    Confidence intervals are commonly misinterpreted by consumers of statistics. Hoekstra et al. [1] presented 120 psychology researchers and 442 students with ‘a fictitious scenario of a professor who conducts an experiment and reports a 95% CI for the mean that ranges from 0.1 to… »

  • Quasi-likelihood gamma regression in statsmodels for zeroes in observations

    03 September 2022 (updated 06 September 2022) | mathematics statistics | Comment

    Generalised linear models with a gamma distribution and log link are frequently used to model non-negative right-skewed continuous data, such as costs [1].

    For example, in statsmodels:

    import numpy as np
    import pandas as pd
    from scipy import stats
    import statsmodels.api as sm
    
    #
    … »
  • Robust Poisson regression in medical biostatistics

    29 August 2022 (updated 03 September 2022) | mathematics statistics medicine | Comment

    Log-binomial and robust (modified) Poisson regression are common approaches to estimating risk ratios in medical biostatistics [1].

    I have discussed log-binomial regression in a previous post about generalised linear models. The conceptual basis for using log-binomial regression to estimate risk ratios is straightforward –… »

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