Table 3 Validity of the Western Australia Antenatal Influenza Vaccination Database (WAAIVD) for capturing antenatal vaccinations (n = 563), by patient characteristics

n

N

% (95 % CI)

% (95 % CI)

% (95 % CI)

% (95 % CI)

Total

145

144

45.7 (40.1–51.4)

99.3 (96.2–99.9)

99.6 (97.8–99.9)

59.1 (54.3–63.7)

 18–29

49

107

44.9 (35.8–54.3)

97.9 (89.3–99.6)

99.0 (94.7–99.8)

63.3 (55.7–70.4)

 30–39

85

187

45.5 (38.5–52.6)

100 (95.7–100)

100 (97.3–100)

57.1 (50.8–63.3)

 40–45

11

21

52.4 (32.4–71.7)

100 (74.1–100)

100 (70.1–100)

47.4 (27.3–68.3)

 Quintile 1 (Most disadvantaged)

3

12

25.0 (5.5–57.2)

100 (43.9–100)

100 (56.6–100)

35.7 (16.3–61.2)

 Quintile 2

17

32

53.1 (34.7–70.9)

100 (81.6–100)

100 (83.9–100)

57.1 (40.9–72.0)

 Quintile 3

32

69

44.9 (32.9–57.4)

96.9 (84.3–99.4)

96.9 (83.8–99.4)

44.1 (32.9–55.9)

 Quintile 4

31

56

55.4 (42.4–67.6)

100 (88.8–100)

100 (93.0–100)

67.1 (55.9–76.6)

 Quintile 5 (Least disadvantaged)

56

138

40.6 (32.7–48.9)

100 (93.6–100)

100 (97.1–100)

61.1 (54.4–67.5)

 Has ≥1 chronic medical condition

22

46

47.8 (34.1–61.9)

100 (85.1–100)

100 (91.8–100)

64.2 (52.2–74.6)

 No chronic medical condition

123

269

45.3 (39.5–51.3)

99.2 (95.5–99.9)

99.5 (97.3–99.9)

58.1 (52.9–63.2)

 Public hospital AN clinic

67

117

56.4 (47.4–65.1)

98.5 (92.0–99.7)

99.2 (95.8–99.9)

71.7 (64.7–77.7)

 General practice clinic

30

57

52.6 (39.9–65.0)

100 (88.6–100)

100 (91.0–100)

59.1 (47.0–70.1)

 Private obstetrician

46

137

33.6 (26.2–41.8)^§§

100 (92.3–100)

100 (94.9–100)

44.2 (36.8–51.8)^g