Behavioral intention to use of vitamin D and iron supplements by adolescents: an application of the theory of planned behavior

Investigate the effect of educational intervention program based on the theory of planned behavior associated with iron and vitamin D supplementation on components the model on Gonabad female high school students.

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20180722040559N1

Enrollment

175

Registered

2018-10-03

Start date

2017-10-25

Completion date

Unknown

Last updated

2018-11-05

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

Conditions

use of vitamin D and iron supplements. Inappropriate diet and eating habits

Interventions

Intervention 1: Intervention group: In the intervention group, education based on the theory of planned behavior was performed with 4 sessions of 120 minutes. Intervention 2: Control group: No interve

Eligibility

Sex/Gender

Female

Age

12 Years to 14 Years

Inclusion criteria

Inclusion criteria: seventh-grade studentship Gonabad residence willingness to participate in the study

Exclusion criteria

Exclusion criteria: Having one or more session absentee at training sessions Students who participated in the pre-test but were not present in the post-test changing their schools

Design outcomes

Primary

Measure	Time frame
Knowledge. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Attitude. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Subjective norm. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Perceived behavioral control. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Intention. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.	—

Measure

Time frame

Knowledge. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Attitude. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Subjective norm. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Perceived behavioral control. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.;Intention. Timepoint: One month after the meeting and after the test made by questionnaire, the two groups will be measured. Method of measurement: questionnaire.

—

Secondary

Measure	Time frame
Behavioral intention. Timepoint: Baseline (pre-intervention) and one month after intervention. Method of measurement: questionnaire.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactGonabad University of Medical Sciences

Gonabad University of Medical Sciences

jafaria962@mums.ac.ir+98 51 38049

Outcome results

None listed

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