Table 1.

Constructs measured at baseline and during study appointments.

Constructs measured at baseline (Cited studies describe survey items and psychometric properties)	Number of Items	Cronbach alpha	Measured during study appointment? (Yes, Stage(s)/No)
Parent demographics: age, race/ethnicity, sex, education, number of children	6	Not applicable	No
General attitudes toward vaccine [48,49]	5		No
Vaccine hesitancy [50,51]	10	.74-.84	No
Knowledge about human papillomavirus (HPV) disease and HPV vaccine [52,53]	7	.70	No
Intentions [54]	3	.96	Yes, Stages 1-3
Precaution Adoption Process Model decision stage [55]	1	Not applicable	Yes, Stages 1-3
Perceived susceptibility [54]	3	.94	Yes, Stages 1-3
Perceived severity [54]	3	.91	Yes, Stages 1-3
Self-efficacy [54]	2	.85	Yes, Stages 1-3
Subjective norms [11,54]	8	.78	No
Perceived benefits [48,56,57]	8	.88	Yes, Stages 1-3
Perceived barriers [54,58-60]	6	.91	Yes, Stages 1-3
Motivation for vaccination [61]	8	.73-.93	Yes, Stages 1a & 2
Trust in provider [62]	1	.86	No
Patient involvement in medical care [63]	18	.83	Yes, Stages 1b & 3