Table 4 Geometric mean concentrations (GMC) and 95% confidence intervals (CI) for type-specific human papillomavirus (HPV) immunoglobulin G antibodies at three years after completion of a two-dose series of nine-valent HPV vaccine among Alaska Native children, by sex and age group at first dose

HPV 6

186

(145–240)

267

(207–344)

0.05

226

(185–276)

195

(127–300)

HPV 11

154

(123–193)

193

(157–238)

0.15

178

(149–213)

147

(108–199)

HPV 16

80

(64–100)

115

(93–143)

0.02

101

(85–119)

73

(47–113)

HPV 18

24

(18–31)

32

(25–40)

0.11

28

(23–34)

23

(15–37)

HPV 31

74

(61–91)

108

(88–132)

0.01

95

(82–110)

65

(44–97)

HPV 33

103

(80–131)

154

(119–199)

0.03

129

(105–158)

103

(68–156)

HPV 45

21

(16–27)

31

(24–40)

0.03

26

(22–32)

21

(13–33)

HPV 52

161

(132–197)

215

(170–270)

0.07

196

(166–230)

143

(96–211)

HPV 58

183

(143–234)

241

(194–299)

0.10

218

(181–263)

171

(119–245)