The Effect of Poorly Designed School Furniture on Children's Head and Scapulae Postures

Ergonomics Clinical Trial

Official title:

The Effect of Poorly Designed School Furniture on Children's Head and Scapulae Postures: A Cross Sectional Design

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04758832
• Other study ID #: P.T.REC/012/003029
• Status: Completed
• Start date: March 1, 2017
• Est. completion date: April 30, 2019

Study information

• Verified date: February 2021
• Source: Delta University for Science and Technology
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

investigate the compatibility of school furniture design

Recruitment information / eligibility

• Status: Completed
• Enrollment: 200
• Est. completion date: April 30, 2019
• Est. primary completion date: April 30, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 7 Years to 9 Years

Eligibility

Inclusion Criteria:

• had normal body mass index (ranged from 18.5 to 24.9 kg/ m2),
• The school furniture workstations used by all subjects were all of wooden flat desks and benches.

Exclusion Criteria:

• suffering from respiratory or heart problems

Related Conditions & MeSH terms

• Ergonomics

Locations

Country	Name	City	State
Egypt	AAA	Cairo

Sponsors (1)

Lead Sponsor	Collaborator
Delta University for Science and Technology

Country where clinical trial is conducted

Egypt, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	weight	measured in kilograms	up to 24 weeks
Primary	height	measured in centimetres	up to 24 weeks
Primary	Body mass index (BMI)	It was calculated as the ratio of the subject's height (in meter) and weight (in kilogram) i.e. BMI= Weight/ Height2	up to 24 weeks
Primary	anthropometric measurement for child	The anthropometric measurement for child were measured in mm by Auto CAD analysis for recorded photographs from sitting position.it include:1) elbow seat height: Measured with the elbow flexed at 90°, as the vertical distance from the bottom of the tip of the elbow to the student's seated surface, 2) shoulder height: Measured as the vertical distance from the top of the shoulder at the acromion process to the student's sitting surface,3) upper limb length: Difference between the elbow height and shoulder height.	up to 24 weeks
Primary	anthropometric measurement for school furniture	The furniture dimensions were measured in mm by Auto CAD analysis for recorded photographs from sitting position.it include: 1) seat height: Measured as a distance from the floor to the highest point on the front of the seat, 2) seat depth: Measured from the back of the sitting surface of the seat to its front,3) backrest height: The vertical distance from the desk seat to the top edge of backrest, 4)desk- seat height: The vertical distance from the seat to the top of the front edge of the desk and 5) under surface of desk height: The vertical distance from the floor to the bottom of the front edge of the shelf under the writing surface..	up to 24 weeks
Secondary	Correlation between educational furniture dimensions and the user body dimensions	the percentage of compatibility for the ergonomics design of school furniture were tested by using the following equations: Equation (1): Seat height to popliteal height (N +2) cos 30°= SH < (N + 2) cos 5° Where SH is seat height and N is popliteal height). Equation (2): Seat depth to the popliteal-buttock length 80%M= SD < 95%M Where SD is seat depth and M is popliteal-buttock length. Equation (3): Backrest height:60% H= BH < 80% H Where BH is backrest height and H is shoulder height (scapula height). the previous equations represent the correlation between arthopemeteric measurements for the child (the user) and anthropometric measurement for school furniture.The percentage of matching and dis-matching school furniture calculated.	through study completion, an average of 1 year.
Secondary	Head postures (angles)	Auto CAD program (version 2013) used to determine head postures (angles). 1) Head flexion angle: Line of canthus to tragus with respect to vertical (measured from vertical above intersect). 2) Neck flexion angle : Line of tragus to C7 with respect to vertical (measured from vertical above intersect)	through study completion, an average of 1 year.
Secondary	scapular postures (displacement and elevation).	Auto CAD program (version 2013) used to determine scapular postures (displacement and elevation in mm). 1) Scapula displacement: Horizontal distance between markers at C7 and the anterior border of the acromion (measured in mm), 2)Scapula elevation: Vertical distance between markers at C7 and the anterior border of the acromion.	through study completion, an average of 1 year.