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Longitudinal Research

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...

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Related Experiment Video

Updated: Jun 10, 2025

Oral Health Assessment by Lay Personnel for Older Adults

Oral Health Assessment by Lay Personnel for Older Adults

Published on: February 2, 2020

Oral Health Status at Age 60 and 72 Years-A Longitudinal Study.

Sladjana Critén¹, Pia Andersson¹, Stefan Renvert^1,2

¹Faculty of Health Sciences, Kristianstad University, Kristianstad, Sweden.

International Journal of Dental Hygiene

|October 17, 2024

Summary

This summary is machine-generated.

Oral health in 60-year-olds declined over 12 years, with minor tooth loss and periodontal changes. This longitudinal study highlights age-related oral health deterioration in older adults.

Keywords:

caries epidemiology older persons oral health oral health status periodontal diseases periodontitis

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Area of Science:

Gerontology
Dental Public Health
Epidemiology

Background:

Oral health is crucial for overall well-being in aging populations.
Longitudinal data on oral health changes in 60-year-olds are essential for targeted interventions.

Purpose of the Study:

To investigate the 12-year changes in oral health status among 60-year-old individuals.
To analyze trends in tooth loss, caries, and periodontal health over time.

Main Methods:

Utilized data from The Swedish National Study on Aging and Care (SNAC).
Included 119 individuals aged 60 at baseline (2001-2003) with a 12-year follow-up (2013-2015).
Employed paired t-tests and McNemar's test for statistical analyses (p < 0.05).

Main Results:

A significant decrease in mean number of teeth and proportion of individuals with ≥20 teeth (p < 0.001).
Increased prevalence of buccal/lingual and approximal caries lesions (p < 0.029, p < 0.031).
Elevated incidence of gingivitis (p < 0.001) and periodontitis (p < 0.043), particularly in females.

Conclusions:

Oral health status deteriorates in 60-year-old individuals over a 12-year period.
Deteriorations observed were minor regarding tooth loss, caries, and periodontal status changes.
Findings underscore the need for continued monitoring of oral health in aging populations.