Supplementary Materials

Full text

Online-Only Supplementary Material
Supplementary Table 1. Rank Order of Parental Reasons for Vaccine Hesitancy among
All Teens, 2010-2015
Supplementary Table 2. Rank Order of Parental Reasons for Vaccine Hesitancy among
Unvaccinated Teens by Sex, 2010-2015
Supplementary Table 3. Rank Order of Parental Reasons for Vaccine Hesitancy among
Undervaccinated Teens by Sex, 2010-2015
Page 1

Supplementary Table 1. Rank Order of Parental Reasons for Vaccine Hesitancy
among All Teens, 2010-2015
All Teens (n=38,405)a
Rank Parental Reason Wgt % 95% CI
1Not Needed/Necessary 22.5 21.7, 23.2
2Not Recommended 15.9 15.3, 16.6
3Lack of Knowledge 12.8 12.2, 13.4
4Not Sexually Active 12.1 11.5, 12.7
5Safety Concerns/Side Effects 10.1 9.6, 10.7
6Child is Maleb5.1 4.8, 5.5
7Not Appropriate Age 4.2 3.9, 4.6
8Family/Parental Decision 2.6 2.3, 2.9
9Not a School Requirement 2.2 1.9, 2.5
10 Costs 1.7 1.5, 2.0
11 More Info/New Vaccine 1.7 1.5, 2.0
12 Other Reason 1.6 1.3, 1.8
13 Child Fearful 1.5 1.2, 1.8
14 Child Should Make Decision 1.0 0.8, 1.3
15 No Doctor or Doctor’s Visit Not Scheduled 0.8 0.7, 1.0
16 Already Up-to-Date 0.8 0.6, 1.0
17 Handicapped/Special Needs/Illness 0.7 0.6, 0.9
18 Don’t Believe in Immunizations 0.7 0.6, 0.8
19 Religion/Orthodox 0.6 0.4, 0.8
20 Increased Sexual Activity Concern 0.5 0.4, 0.6
21 Effectiveness Concern 0.2 0.2, 0.3
22 Not Available 0.1 0.1, 0.2
23 Time 0.1 0.05, 0.2
24 College Shot 0.1 0.02, 0.1
25 Already Sexually Active 0.03 0.01, 0.1
26 No OB/GYNc0.02 0.002, 0.03
Abbreviations: Wgt % = weighted percentage; 95% CI = 95% confidence interval.
aIncludes all unvaccinated and undervaccinated teens eligible for the reason analysis regardless of sex.
bValid response only for males.
cValid response only for females.
Page 2

Supplementary Table 2. Rank Order of Parental Reasons for Vaccine Hesitancy
among Unvaccinated Teens by Sex, 2010-2015
Females (n=11,833) Males (n=24,456)
Rank Parental Reason Wgt % 95% CI Rank Parental Reason Wgt % 95% CI
1 Not Needed/Necessary 20.5 19.3, 21.7 1 Not Needed/Necessary 23.7 22.8, 24.7
2Safety Concerns/Side
Effects 17.9 16.7, 19.1 2 Not Recommended 19.2 18.4, 20.1
3 Not Sexually Active 14.3 13.2, 15.3 3 Lack of Knowledge 13.1 12.4, 13.9
4 Lack of Knowledge 12.0 10.9, 13.1 4 Not Sexually Active 11.6 10.8, 12.4
5 Not Recommended 9.1 8.2, 10.0 5 Child is Male 8.0 7.5, 8.6
6 Not Appropriate Age 5.4 4.7, 6.0 6 Safety Concerns/Side
Effects 6.3 5.7, 6.8
7 Family/Parental Decision 3.8 3.2, 4.3 7 Not Appropriate Age 3.7 3.3, 4.1
8 More Info/New Vaccine 3.1 2.5, 3.6 8 Not a School
Requirement 2.5 2.1, 2.9
9 Costs 2.0 1.5, 2.5 9 Family/Parental Decision 2.1 1.8, 2.4
10 Other Reason 1.9 1.4, 2.4 10 Costs 1.5 1.2, 1.8
11 Child Fearful 1.7 1.2, 2.1 11 Other Reason 1.4 1.2, 1.7
12 Not a School
Requirement 1.6 1.2, 2.1 12 Child Fearful 1.2 0.9, 1.6
13 Child Should Make
Decision 1.6 1.0, 2.1 13 More Info/New Vaccine 1.1 0.9, 1.4
14 Religion/Orthodox 1.2 0.6, 1.9 14 No Doctor or Doctor’s
Visit Not Scheduled 1.0 0.8, 1.2
15 Don’t Believe in
Immunizations 1.0 0.7, 1.3 15 Child Should Make
Decision 0.7 0.5, 0.9
16 Handicapped/Special
Needs/Illness 0.9 0.6, 1.1 16 Don’t Believe in
Immunizations 0.6 0.4, 0.7
17 Increased Sexual Activity
Concern 0.6 0.4, 0.8 17 Handicapped/Special
Needs/Illness 0.5 0.3, 0.6
18 No Doctor or Doctor’s
Visit Not Scheduled 0.5 0.3, 0.7 18 Increased Sexual Activity
Concern 0.4 0.3, 0.6
19 Already Up-to-Date 0.4 0.2, 0.6 19 Already Up-to-Date 0.4 0.3, 0.5
20 Effectiveness Concern 0.4 0.2, 0.6 20 Religion/Orthodox 0.4 0.3, 0.5
21 Not Available 0.1 0, 0.2 21 Not Available 0.1 0.1, 0.2
22 No OB/GYN 0.1 0.007, 0.1 22 Effectiveness Concern 0.1 0.1, 0.2
23 Time 0.05 0, 0.1 23 College Shot 0.1 0.02, 0.2
24 College Shot 0.02 0.002, 0.04 24 Time 0.1 0.02, 0.1
25 Already Sexually Active 0.01 0, 0.03 25 Already Sexually Active 0.05 0.01, 0.1
Abbreviations: Wgt % = weighted percentage; 95% CI = 95% confidence interval.
Page 3

Supplementary Table 3. Rank Order of Parental Reasons for Vaccine Hesitancy
among Undervaccinated Teens by Sex, 2010-2015
Females (n=1,075) Males (n=1,041)
Rank Parental Reason Wgt % 95% CI Rank Parental Reason Wgt % 95% CI
1 Not Needed/Necessary 20.4 16.3, 24.5 1 Not Recommended 21.3 16.1, 26.5
2 Not Recommended 15.0 11.8, 18.3 2 Not Needed/Necessary 20.5 16.0, 25.0
3 Lack of Knowledge 13.5 10.0, 16.9 3 Lack of Knowledge 14.2 10.6, 17.9
4Safety Concerns/Side
Effects 12.4 8.2, 16.6 4 Already Up-To-Date 8.3 4.1, 12.5
5 Not Sexually Active 7.3 5.2, 9.5 5 Safety Concerns/Side
Effects 6.0 3.6, 8.3
6 Already Up-To-Date 5.7 3.1, 8.2 6 Not Sexually Active 5.1 3.0, 7.1
7 Not Appropriate Age 5.2 1.8, 8.6 7 Child is Male 4.2 1.9, 6.4
8Handicapped/Special
Needs/Illness 3.4 0.3, 6.5 8 Child Fearful 3.5 0, 7.7
9 Child Fearful 3.3 0.9, 5.7 9 Costs 2.7 0.4, 5.0
10 Not a School
Requirement 3.3 1.6, 5.0 10 Child Should Make
Decision 2.4 0, 5.2
11 Costs 2.7 1.3, 4.2 11 Not a School
Requirement 2.4 1.3, 3.5
12 Family/Parental Decision 2.7 1.3, 4.2 12 Not Appropriate Age 2.3 1.1, 3.4
13 Other Reason 0.9 0.3, 1.5 13 Other Reason 1.7 0.5, 2.8
14 Child Should Make
Decision 0.9 0.1, 1.6 14 Handicapped/Special
Needs/Illness 1.3 0.2, 2.5
15 No Doctor or Doctor’s
Visit Not Scheduled 0.8 0.2, 1.5 15 Time 1.2 0.02, 2.4
16 More Info/New Vaccine 0.7 0.1, 1.2 16 Family/Parental Decision 1.1 0.4, 1.9
17 Time 0.5 0, 1.2 17 No Doctor or Doctor’s
Visit Not Scheduled 0.8 0.1, 1.5
18 Don’t Believe in
Immunizations 0.3 0, 0.7 18 Don’t Believe in
Immunizations 0.4 0, 1.1
19 Increased Sexual Activity
Concern 0.3 0.02, 0.5 19 Increased Sexual Activity
Concern 0.3 0, 0.6
20 Effectiveness Concern 0.2 0, 0.5 20 More Info/New Vaccine 0.3 0, 0.6
21 Not Available 0.2 0, 0.5 21 Not Available 0.03 0, 0.1
22 Religion/Orthodox 0.1 0, 0.4 22 Effectiveness Concern 0.02 0, 0.1
23 College Shot 0.1 0, 0.2 -- Already Sexually Active NR a
24 Already Sexually Active 0.03 0, 0.1 -- College Shot NR a
-- No OB/GYN NR a-- Religion/Orthodox NR a
Abbreviations: Wgt % = weighted percentage; 95% CI = 95% confidence interval; NR = no responses.
aUnable to estimate a confidence interval.
Page 4