Table 1.

Variable definitions used in creation of cohort and regression modeling.

Variable name	Variable Definition
Family identifier	Unique number tied to the contract holder used to identify adolescents who have coverage under the same plan member
Non-initiators	Adolescents who have claims data but have no record of an HPV vaccination using CPT codes: 90649, 90650, 90,651
Initiators	Adolescents with at least one dose of the HPV vaccine using CPT codes: 90649, 90650, 90,651
Total MOs	Sum of MOs for HPV vaccination occurring between ages 11 and 13
Adolescent birth year	Birth year associated with adolescent
Adolescent gender	Male or female
Tdap/MenACWY vaccines received	CPT Codes: 90714, 90715; CPT codes for MenACWY: 90619, 90734
Total number of adolescent vaccines	Value of zero (no Tdap or MenACWY), one (Tdap or MenACWY), or two (both Tdap and MenACWY)
Total influenza vaccines received	Sum of influenza vaccines calculated using CPT Codes: 90630, 90653, 90654, 90655, 90656, 90657, 90658, 90659, 90660, 90661, 90662, 90672, 90673, 90674, 90682, 90685, 90686, 90687, 90688, 90694, 90,724
Number of well-child Visits	Total of encounters for the following ICD 9/10 codes for: routine child health examination (Z00.12/V.202), with abnormal findings (Z00.121/V.202), without abnormal findings (Z00.129/V.202)
Provider type	Dichotomous indicator for pediatrician vs. all other types of specialties
Provider birth decade	Birth year of primary physician, categorized into decades: 1930–1939, 1940–1949, 1950–1959, 1960–1969, 1970–1979, 1980–1989, 1990–1999
Rurality	Dichotomous definition of RUCA ZCTA-codes using the assigned primary care provider’s city Urban codes: 1.0, 1.1, 2.0, 2.1, 3.0. 3.1, 4.1, 5.1, 7.1, 8.1, 10.1 Rural codes: 4.0, 4.2, 5.0. 5.2, 6.0, 6.1, 7.0, 7.2, 7.3, 7.4, 8.0, 8.2, 8.3, 8.4, 9.0, 9.1, 9.2, 10.0. 10.2, 10.3, 10.4, 10.5, 10.6