---
title: What makes some PMS studies more reliable than others? | Niyora
description: Most PMS studies have quality problems, but studies with fewer authors and lower-profile journals tend to be better designed. We still need more rigorous rese
url: https://niyora.com/research/papers/risk-of-bias-assessment-in-non-randomized-studies-of-interventions-for-2022/
---

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- What makes some PMS studies more reliable than others?

Systematic review, 2022

# What makes some PMS studies more reliable than others?

Most PMS studies have quality problems, but studies with fewer authors and lower-profile journals tend to be better designed. We still need more rigorous research on PMS treatments.

 Strong study design

Analysis of 38 published studies on PMS interventions

## What they did

Systematic review of 1,668 non-randomized studies from 2010 to 2021, narrowed to 38 that met inclusion criteria. They used the ROBINS-1 tool to assess how much bias each study had.

## What they found

31.6% of studies had low or moderate risk of bias, while 68.4% had serious or critical risk. Studies with fewer authors and lower impact factor journals showed better quality.

## What it means for you

Most PMS intervention studies do not meet high quality standards. This review examined research quality itself, not whether treatments work, so it doesn't answer questions about what helps PMS.

31.6%

Studies with low or moderate bias

68.4%

Studies with serious or critical bias

38

Studies reviewed

## About the study

Original title Risk of Bias Assessment in Non-Randomized Studies of Interventions for Premenstrual Syndrome: A Systematic Review Authors Tehfe H, Chow R, Li S et al. Journal Journal of family & reproductive health Year 2022 Study design Systematic review What was tested None. This assessed research quality, not tested a treatment. Open access Yes Read the paper [doi.org/10.18502/jfrh.v16i2.9476](https://doi.org/10.18502/jfrh.v16i2.9476)

## Topics

[Premenstrual syndrome (PMS)](https://niyora.com/research/topics/condition-pms/)[Relationships and partners](https://niyora.com/research/topics/life-area-relationships/)

Research tells you what helps on average. Niyora helps on the day it hits.

Calm down, see it another way, and decide what to say, with a PMS and PMDD app built by a doctor.

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