Does a text messaging intervention improve knowledge, attitudes and practice regarding iodine deficiency and iodized salt consumption?

Public Health Nutr. 2012 Dec;15(12):2320-5. doi: 10.1017/S1368980012000869. Epub 2012 Jul 2.


Objective: To determine the effectiveness of implementation of a prevention programme via mobile phone text messaging in enhancing knowledge, attitudes and practice concerning iodine deficiency and iodized salt consumption.

Design: In a randomized controlled trial, participants were subjected to a brief tele-educational support regarding iodine deficiency and the importance of iodized salt consumption. The intervention group received daily text messages via mobile phone for 6 weeks. Knowledge, attitude and practice scores, urinary iodine concentration and salt iodine content were assessed at baseline and 8 weeks after the intervention.

Setting: Participants were recruited from health-care centres in Tehran, the capital city of Iran.

Subjects: For the present study 205 females aged ≥18 years were randomly assigned to the intervention (n 95) and control (n 110) groups.

Results: A significant difference was found in median knowledge scores between the intervention and control groups at follow-up (P = 0.004). There was also a significant difference in median attitude scores between the intervention and control groups (P = 0.02). The intervention group did not differ significantly in median practice score, urinary iodine concentration and salt iodine content from the control group.

Conclusions: Text messaging interventions are effective in improving individuals' knowledge and attitudes regarding preventive health-care topics.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Deficiency Diseases* / urine
  • Diet
  • Female
  • Health Education / methods*
  • Health Knowledge, Attitudes, Practice*
  • Health Promotion / methods*
  • Humans
  • Iodine / administration & dosage
  • Iodine / deficiency*
  • Iodine / urine
  • Iran
  • Middle Aged
  • Nutritional Status
  • Sodium Chloride, Dietary*
  • Text Messaging*


  • Sodium Chloride, Dietary
  • iodized salt
  • Iodine