Investigating the impact of laptop support base on the degree of discomfort and performance of computer users

Investigating the impact of an ergonomic laptop holder with the ability to adjust the height of the surface and the viewing angle of computer users on the level of performance and discomfort with and without the use of a laptop holder.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20180902040923N6

Enrollment

Registered

2022-08-02

Start date

2022-07-16

Completion date

Unknown

Last updated

2022-08-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Condition 1: Musculoskeletal disorders of the lumbar region and neck. Condition 2: Pain and musculoskeletal disorder. Other specified disorders of muscle

Interventions

Intervention 1: Intervention 1: Typing using an ergonomic laptop holder. Intervention 2: Intervention group 2: Typing with conventional adjustment of laptop height and angle. Intervention 3: Control

Eligibility

Sex/Gender

All

Age

18 Years to 45 Years

Inclusion criteria

Inclusion criteria: Participants must pass a net typing speed of 50 words per minute in a standard typing test (3 minutes test) Study participants will be selected from the 50th percentile of height and weight to control the confounding variable of anthropometric dimensions Normal or corrected vision

Exclusion criteria

Exclusion criteria: Computer users with musculoskeletal pain or discomfort in the upper limbs Computer users with musculoskeletal pain or discomfort in the lower limb Computer users with musculoskeletal pain or discomfort in the neck and head

Design outcomes

Primary

Measure	Time frame
Posture risk level. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, the assessment of the posture risk level variable is done. Method of measurement: Evaluation of the position of body parts compared to the natural position using the scoring system of the RULA (Rapid Upper Limb Assessment) technique.;Musculoskeletal discomfort. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, the assessment of the musculoskeletal discomfort variable is done. Method of measurement: Examining the amount of discomfort felt by the participants through visual analog scales (rating from 0 no pain to 10 the most pain).;Typo error. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, the assessment of the typo error variable is done. Method of measurement: The number of wrongly typed words (counted by Word software).;Number of typed words. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, number of typed word is evaluated. Method of measurement: counted by Word software.	—

Measure

Time frame

Posture risk level. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, the assessment of the posture risk level variable is done. Method of measurement: Evaluation of the position of body parts compared to the natural position using the scoring system of the RULA (Rapid Upper Limb Assessment) technique.;Musculoskeletal discomfort. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, the assessment of the musculoskeletal discomfort variable is done. Method of measurement: Examining the amount of discomfort felt by the participants through visual analog scales (rating from 0 no pain to 10 the most pain).;Typo error. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, the assessment of the typo error variable is done. Method of measurement: The number of wrongly typed words (counted by Word software).;Number of typed words. Timepoint: The typing duration in each random trial is 30 minutes, and rest time is considered between the trials. After finishing typing in each of the random dependent groups, number of typed word is evaluated. Method of measurement: counted by Word software.

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactMohamad Sadegh Ghasemi

Iran University of Medical Sciences

ghasemi.m@iums.ac.ir+98 21 8670 4839

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026