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Table 4 Communality estimates and variance of the items from perceived benefits and barriers domain – Factor analysisa

From: Parental knowledge, attitudes and perception of pneumococcal disease and pneumococcal conjugate vaccines in Singapore: a questionnaire-based assessment

 

Factor loadingsb

 

Item (Perceived benefits and barriers)

Factor 1

Factor 2

Communality estimates

1

By allowing my child to take the PCV I will help protect my child from pneumococcal disease

0.82

0.68

2

There are too many doses required for vaccination with the PCV

0.70

0.50

3

The number of doses of PCV will influence my decision whether to vaccinate my child at a younger or older age

0.52

0.27

4

My child does not need the PCV as he/she is strong enough to cope with pneumococcal disease

–0.65

0.44

5

PCV causes disease

–0.31

0.38

0.24

6

Vaccination with PCV is too painful for my child

–0.25

0.45

0.27

7

There are too many childhood vaccinations for my child to take

0.68

0.50

8

PCV does more good than harm

0.84

0.72

9

It is my responsibility to ensure that my child is vaccinated against pneumococcal disease

0.80

0.64

10

It is not easy for me to find time to bring my child to the clinic for the PCV

0.37

0.14

11

Transportation to the clinic for PCV is a problem

0.27

0.10

12

The PCV works

0.53

0.28

13

There is no long term benefit of the PCV

−0.24

0.26

0.13

14

There are short-term side effects from the PCV

0.32

0.10

15

The cost of the PCV is too high

0.52

0.27

 

Percentage explained (%)

82.70

  1. Communality: Proportion of variance in items explained by the factors
  2. Percentage explained: Proportion (Percentage) of variance in the data that is explained by all the factors
  3. PCV pneumococcal conjugate vaccine
  4. aFactor Analysis (using PROMAX rotation; Unweighted Least Squares [ULS] method; Squared Multiple Correlations [SMC] Priors and MINIMUM EIGEN value >1 to retain the number of factors) was performed to identify the latent factors for perceived benefits and barriers
  5. bFactor loadings < 0.2 are suppressed