| CTRI Number |
CTRI/2026/01/102274 [Registered on: 28/01/2026] Trial Registered Prospectively |
| Last Modified On: |
23/01/2026 |
| Post Graduate Thesis |
No |
| Type of Trial |
Observational |
|
Type of Study
|
Cross Sectional Study |
| Study Design |
Other |
|
Public Title of Study
|
Impact of Mobile Phone Usage on Hand Strength and Writing Skills in School Students |
|
Scientific Title of Study
|
Association Between Mobile Phone Usage Duration, Hand Grip Strength, And Handwriting Legibility In School Students |
| Trial Acronym |
NIL |
|
Secondary IDs if Any
|
| Secondary ID |
Identifier |
| NIL |
NIL |
|
|
Details of Principal Investigator or overall Trial Coordinator (multi-center study)
|
| Name |
Dr Manikumar M |
| Designation |
Professor |
| Affiliation |
SRM College Of Physiotherapy,SRMIST,Kattankulathur. |
| Address |
Room No PT 23,4TH Floor,SRM College Of Physiotherapy,SRM Medical College Hospital and Research Centre,SRMIST,Kattankulathur.
Chennai
TAMIL NADU
603203
India |
| Phone |
6374135516 |
| Fax |
|
| Email |
manikumm@srmist.edu.in |
|
Details of Contact Person
Scientific Query
|
| Name |
Dr Manikumar M |
| Designation |
Professor |
| Affiliation |
SRM College Of Physiotherapy,SRMIST,Kattankulathur. |
| Address |
Room No PT 23,4TH Floor,SRM College Of Physiotherapy,SRM Medical College Hospital and Research Centre,SRMIST,Kattankulathur.
Chennai
TAMIL NADU
603203
India |
| Phone |
6374135516 |
| Fax |
|
| Email |
manikumm@srmist.edu.in |
|
Details of Contact Person
Public Query
|
| Name |
Logesh Sai A G |
| Designation |
Student |
| Affiliation |
SRM College Of Physiotherapy,SRMIST,Kattankulathur. |
| Address |
Room No PT 23,4TH Floor,SRM College Of Physiotherapy,SRM Medical College Hospital and Research Centre,SRMIST,Kattankulathur.
Chennai
TAMIL NADU
603203
India |
| Phone |
6374135516 |
| Fax |
|
| Email |
la3081@srmist.edu.in |
|
|
Source of Monetary or Material Support
|
|
|
Primary Sponsor
|
| Name |
Logesh Sai A G |
| Address |
Room No PT 23,4TH Floor,SRM College Of Physiotherapy,SRM Medical College Hospital and Research Centre,SRMIST,Kattankulathur
Chennai 603203
India |
| Type of Sponsor |
Other [Self Sponsor] |
|
|
Details of Secondary Sponsor
|
|
|
Countries of Recruitment
|
India |
|
Sites of Study
|
| No of Sites = 1 |
| Name of Principal
Investigator |
Name of Site |
Site Address |
Phone/Fax/Email |
| Dr Logesh sai A G |
SRM Medical College Hospital and Research Centre. |
Room No PT 23,4TH Floor,SRM College Of Physiotherapy,SRMIST,
Kattankulathur 603203
Chennai
TAMIL NADU |
6374135516
la3081@srmist.edu.in |
|
|
Details of Ethics Committee
|
| No of Ethics Committees= 2 |
| Name of Committee |
Approval Status |
| SRM MEDICAL COLLEGE HOSPITAL AND RESEARCH CENTER |
Approved |
| SRM MEDICAL COLLEGE HOSPITAL AND RESEARCH CENTER |
Approved |
|
|
Regulatory Clearance Status from DCGI
|
|
|
Health Condition / Problems Studied
|
| Health Type |
Condition |
| Healthy Human Volunteers |
Hand grip strength |
|
|
Intervention / Comparator Agent
|
| Type |
Name |
Details |
| Intervention |
Nil |
Nil |
| Intervention |
Nil |
Nil |
|
|
Inclusion Criteria
|
| Age From |
12.00 Year(s) |
| Age To |
15.00 Year(s) |
| Gender |
Both |
| Details |
School students aged 12 to 15 years.
Students who use mobile phones regularly.
Students willing to participate and provide consent.
Students without chronic neck pain or discomfort.
|
|
| ExclusionCriteria |
| Details |
Students with hand injuries, deformities,
and neuromuscular disorders.
Students with visual or cognitive impairments
affecting handwriting.
Students with chronic neck pain or musculoskeletal
disorders.
Students unwilling to participate in the study.
|
|
|
Method of Generating Random Sequence
|
Not Applicable |
|
Method of Concealment
|
Not Applicable |
|
Blinding/Masking
|
Not Applicable |
|
Primary Outcome
|
| Outcome |
TimePoints |
| Hand grip strength of school students, measured using a hand dynamometer for both dominant and non-dominant hand). |
Baseline assessment 8 weeks |
|
|
Secondary Outcome
|
| Outcome |
TimePoints |
Handwriting legibility, assessed using a standardized handwriting assessment scale for example speed, letter formation, spacing, alignment, and overall readability.
Duration of mobile phone usage, measured as average daily screen time (hours/day), obtained through questionnaire or digital usage records.
Association between mobile phone usage duration and hand grip strength.
Association between mobile phone usage duration and handwriting legibility.
Association between hand grip strength and handwriting legibility. |
Baseline Assessment, 8 weeks |
|
|
Target Sample Size
|
Total Sample Size="90"
Sample Size from India="90"
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" |
|
Phase of Trial
|
N/A |
|
Date of First Enrollment (India)
|
09/02/2026 |
| Date of Study Completion (India) |
Applicable only for Completed/Terminated trials |
| Date of First Enrollment (Global) |
Date Missing |
| Date of Study Completion (Global) |
Applicable only for Completed/Terminated trials |
|
Estimated Duration of Trial
|
Years="0"
Months="3"
Days="0" |
|
Recruitment Status of Trial (Global)
|
Not Applicable |
| Recruitment Status of Trial (India) |
Not Yet Recruiting |
|
Publication Details
|
N/A |
|
Individual Participant Data (IPD) Sharing Statement
|
Will individual participant data (IPD) be shared publicly (including data dictionaries)?
Response - NO
|
|
Brief Summary
|
This study will recruit school students aged 12 to 15 years using purposive sampling after obtaining written consent from both students and parents. Data will be collected on daily mobile phone usage hand grip strength handwriting legibility and posture using standardized tools and the APECS application. All measurements will be systematically recorded and statistically analyzed to determine the association between mobile phone use and hand function posture and handwriting legibility. |