User profiles for Ashley I. Naimi

Ashley Naimi

Associate Professor, Department Epidemiology, Emory University
Verified email at emory.edu
Cited by 3290

Stacked generalization: an introduction to super learning

AI Naimi, LB Balzer - European journal of epidemiology, 2018 - Springer
Stacked generalization is an ensemble method that allows researchers to combine several
different prediction algorithms into one. Since its introduction in the early 1990s, the method …

Mediation misgivings: ambiguous clinical and public health interpretations of natural direct and indirect effects

AI Naimi, JS Kaufman… - International journal of …, 2014 - academic.oup.com
Recent methodological innovation is giving rise to an increasing number of applied papers
in medical and epidemiological journals in which natural direct and indirect effects are …

An introduction to g methods

AI Naimi, SR Cole, EH Kennedy - International journal of …, 2017 - academic.oup.com
Robins’ generalized methods (g methods) provide consistent estimates of contrasts (eg
differences, ratios) of potential outcomes under a less restrictive set of identification conditions …

Reflection on modern methods: demystifying robust standard errors for epidemiologists

MA Mansournia, M Nazemipour, AI Naimi… - International Journal …, 2021 - academic.oup.com
All statistical estimates from data have uncertainty due to sampling variability. A standard
error is one measure of uncertainty of a sample estimate (such as the mean of a set of …

The parametric g-formula for time-to-event data: intuition and a worked example

AP Keil, JK Edwards, DB Richardson, AI Naimi… - …, 2014 - journals.lww.com
Background: The parametric g-formula can be used to estimate the effect of a policy, intervention,
or treatment. Unlike standard regression approaches, the parametric g-formula can be …

Estimating risk ratios and risk differences using regression

AI Naimi, BW Whitcomb - American journal of epidemiology, 2020 - academic.oup.com
Generalized linear models (GLMs) are often used with binary outcomes to estimate odds
ratios. Though not as widely appreciated, GLMs can also be used to quantify risk differences, …

Constructing inverse probability weights for continuous exposures: a comparison of methods

AI Naimi, EEM Moodie, N Auger, JS Kaufman - Epidemiology, 2014 - journals.lww.com
Inverse probability–weighted marginal structural models with binary exposures are common
in epidemiology. Constructing inverse probability weights for a continuous exposure can be …

Mediation analysis for health disparities research

AI Naimi, ME Schnitzer, EEM Moodie… - American journal of …, 2016 - academic.oup.com
Social epidemiologists often seek to determine the mechanisms that underlie health
disparities. This work is typically based on mediation procedures that may not be justified with …

Extreme heat and risk of early delivery among preterm and term pregnancies

N Auger, AI Naimi, A Smargiassi, E Lo, T Kosatsky - Epidemiology, 2014 - journals.lww.com
Background: The relationship between ambient temperature and risk of delivery is poorly
understood. We examined the association between heat and risk of delivery among preterm …

Challenges in obtaining valid causal effect estimates with machine learning algorithms

AI Naimi, AE Mishler, EH Kennedy - American Journal of …, 2023 - academic.oup.com
Unlike parametric regression, machine learning (ML) methods do not generally require
precise knowledge of the true data-generating mechanisms. As such, numerous authors have …