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. Author manuscript; available in PMC: 2020 Jan 21.
Published in final edited form as: Vaccine. 2018 Dec 21;37(4):595–601. doi: 10.1016/j.vaccine.2018.12.017

Figure 1.

Figure 1

Joinpoint regression analysis of frequency of parents of unvaccinated 13–17 year olds who indicated the HPV vaccine was not recommended as reason for not intending to vaccinate their children (N=90,866)

^ Indicates that the Annual Percent Change (APC) is significantly different from zero at the alpha = 0.05 level. Final Selected Model: 1 Joinpoint.