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Table 3 Results of the IRT analysis in the knowledge section (n = 318)

From: Development and validation of knowledge, attitude and practice questionnaire for prevention of respiratory tract infections among Malaysian Hajj pilgrims

Items

b

a

λ

χ2 (df = 8)

P values

K1 Flu-like illnesses are caused by:

Penyakit seperti selsema disebabkan oleh:

  K1i Virus

−1.04

3.12

0.87

120.2

< 0.001

Virus

  K1ii Bacteria

−0.54

2.16

0.78

62.98

< 0.001

Bakteria

  K1iii Allergies

−0.41

3.50

0.9

100.55

< 0.001

Alergi

K2 Flu-like illnesses are spread by:

Penyakit seperti selsema disebarkan oleh:

  K2i Water

0.24

2.32

0.82

88.76

< 0.001

Air

  K2ii Sharing towels with an infected person

−0.32

3.95

0.94

52.78

< 0.001

Berkongsi tuala dengan penghidap

  K2iii Dust

−0.86

2.24

0.79

26.19

0.001

Debu

  K2iv Air

−1.10

3.39

0.88

24.34

0.002

Udara

  K2v Shaking the hands of an infected person with a cough and/or cold

−0.16

1.90

0.75

52.42

< 0.0001

Berjabat tangan dengan pengidap yang batuk atau demam

  K3 Flu-like illnesses are spread quickly

−1.17

1.41

0.64

101.32

< 0.001

Penyakit seperti selsema tersebar dengan pantas

K4 The following persons are at an increased risk of flu-like illnesses:

Berikut merupakan mereka yang berisiko tinggi mengalami penyakit seperti selsema:

  K4i Senior citizens aged 65 and older

−0.57

1.94

0.75

29.26

< 0.001

Warga emas berusia 65 tahun ke atas

  K4ii Smokers

−0.14

3.08

0.87

75.46

< 0.001

Perokok

  K4iii Asthmatics

−0.87

2.83

0.86

43.63

< 0.001

Pesakit asma

  K4iv Diabetics

0.40

4.32

0.93

21.16

0.007

Pesakit diabetes

  K4v People with arthritis

0.43

2.34

0.80

50.84

< 0.001

Penghidap artritis

  Kvi Those in crowded places/among a lot of people

−1.13

1.83

0.73

49.71

< 0.001

Mereka yang berada di tempat yang sesak/dalam kalangan ramai orang

K5 What are the complications of flu-like illnesses?

Apakah komplikasi penyakit seperti selsema?

  K5i Pneumonia

−0.27

2.76

0.90

91.12

< 0.001

Paru-paru berair

  K5ii Bronchitis

−0.14

2.93

0.91

126.49

< 0.001

Bronkitis

  K5iii Difficulty in breathing

0.64

6.26

0.88

22.80

0.004

Kekejangan

  K5iv Multi-organ failure

0.55

2.85

0.89

170.57

< 0.001

Kegagalan pelbagai organ

K6 The following practices can help protect you from flu-like illnesses:

Amalan berikut dapat menghindari anda daripada penyakit seperti selsema:

  K6i Ensuring a healthy diet

−1.05

2.29

0.50

38.14

< 0.001

Memastikan pemakanan yang sihat

  K6ii Receiving vaccinations

−0.80

2.26

0.85

66.51

< 0.001

Menerima vaksinasi

  K6iii Washing your hands with hand sanitizers

−0.86

6.29

0.78

15.08

0.058

Membasuh tangan dengan sanitasi

  K6iv Covering your nose with your hands

−0.67

1.75

0.92

71.99

< 0.001

Menutup mulut dengan tangan

  K6v Wearing a face mask

−1.22

5.07

0.71

10.75

0.216

Memakai topeng muka

K7 The following are reasons for wearing a mask:

Berikut merupakan sebab memakai topeng muka:

  K7i Being in crowded places

−1.03

6.11

0.97

11.82

0.160

Berada di tempat yang sesak

  K7ii Being near people who are coughing

−1.26

4.83

0.96

20.75

0.008

Berada berdekatan orang yang batuk

  K7iii When I am sick

−0.91

4.33

0.94

49.03

< 0.001

Apabila saya sakit

  K8 A cloth facial mask is as effective as a 2-ply surgical facial mask

1.02

1.29

0.60

60.85

< 0.001

Topeng wajah kain sama berkesan dengan topeng wajah pembedahan dua lapisan

  K9 If I am not sick, the used face mask can be stored in a bag for later use

0.72

1.56

0.67

182.10

< 0.001

Jika saya tidak sakit, topeng muka terpakai boleh disimpan dalam beg untuk kegunaan seterusnya

  1. a discrimination, b difficulty, df degree of freedom, IRT item response theory, SE standard error, χ2chi-square, λ standardized loadingItems with P values < 0.05 in the assessment of the item fit are highlighted in bold