Increasing Human Papillomavirus (HPV) Vaccine Uptake Via General Health Messaging

Prevention of cervical cancer and genital warts could be achieved by immunization with the prophylactic human papillomavirus (HPV) vaccines commercially available. However, in the U.S. only 38% of females and 14% of males in the recommended age group (9-26 years) receive the complete, three-dose HPV vaccine. Because the HPV vaccine is covered under the Vaccine for Children Program, the underinsured and uninsured have no-cost access. Nonetheless, data from Los Angeles county suggest that HPV vaccination rates among the uninsured and underinsured groups are significantly lower than the national average, likely related to knowledge of the vaccine, transportation, number of doses and concern of side effects. The primary objective of this pilot study is to evaluate the efficacy of health oriented text messaging to increase HPV vaccine uptake versus standard health messaging (Center for Disease Control and Prevention (CDC) HPV vaccine information flyers).

The investigators hypothesize HPV vaccine uptake will be improved through the receipt of general health messaging that includes HPV vaccine messages. Such messaging will increase knowledge about HPV vaccine availability, as well as improve the perceptions around HPV vaccination. Text messaging will also be more successful in reaching large population groups than traditional flyers/information pamphlets used in clinics.

First, among our three participating clinics, the investigators convened community advisory boards (CABs) of individuals who are English and Spanish speaking to identify appropriate text messages including content, length of message and frequency of messaging (once a week, every other week). Topics included HPV vaccine messages, contraceptive information on hormonal contraception, long-acting reversible contraceptive (LARC) methods, dysmenorrhea, frequent menses, and vaginal discharge. The investigators focused on all topics and specifically messaging of HPV vaccine that are considered neutral and yet compelling. The investigators built upon the feedback obtained from the CAB. Each clinic serves at least 500 uninsured and underinsured children that offer regular HPV vaccination to these children. Of these three clinics, two of the sites will be randomized to the intervention arm (text messaging) and 1 site to have CDC flyers only. The sites currently collect information on all immunization given at their site. The sites will de-identify their vaccine rates for HPV at the end of the study and send us the de-identified data sets for vaccine rates, age (not birth date) and number of nursing/doctor visits made by age group.

Inclusion criteria

• Women who are patients at the clinic
• Age 21+
• Have a working mobile phone with SMS capability

Exclusion criteria

• Male
• <21 years of age
• Do not have a working mobile phone with SMS capability