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Table 3 Results of the IRT analysis in the knowledge section in validation study 2 (n = 759)

From: Development and validation of a new knowledge, attitude, belief and practice questionnaire on leptospirosis in Malaysia

Items

b (SE)

a (SE)

λ

χ2 (df = 8)

P values

K1 Penyakit kencing tikus juga dikenali sebagai penyakit leptospirosis (Rat urine disease is also known as leptospirosis)

0.88 (0.16)

0.71 (0.1)

0.58

28.60

< 0.001

K2 Penyakit kencing tikus disebabkan oleh kuman (Rat urine disease is caused by germs)

−0.67 (0.09)

1.20 (0.13)

0.77

35.02

< 0.001

K3 Penyakit kencing tikus adalah penyakit haiwan yang boleh menjangkiti manusia (Rat urine disease is an animal disease that can infect humans)

−0.73 (0.09)

1.22 (0.13)

0.77

26.76

0.001

K4 Penyakit kencing tikus boleh dikesan melalui ujian darah (Rat urine disease can be detected through blood tests)

−0.37 (0.08)

1.17 (0.12)

0.76

16.23

0.039

K5 Kuman penyakit kencing tikus boleh memasuki badan manusia melalui: (Rat urine disease can enter the human body through:)

K5i Luka pada anggota badan (wounds on limbs)

−0.04 (0.05)

2.11 (0.20)

0.90

35.63

< 0.001

K5ii Mata (eyes)

0.52 (0.04)

6.11 (0.74)

0.99

18.90

0.015

K5iii Hidung (nose)

0.38 (0.05)

6.45 (0.73)

0.99

28.73

< 0.001

K5iv Mulut (mouth)

0.15 (0.04)

5.14 (0.62)

0.98

36.24

< 0.001

K5v Makanan yang tercemar (contaminated foods)

−0.61 (0.06)

2.24 (0.24)

0.91

33.63

< 0.001

K5vi Minuman yang tercemar (contaminated drinks)

−0.63 (0.06)

2.30 (0.25)

0.92

38.73

< 0.001

K5vii Bersalaman dengan pesakit penyakit kencing tikus (shaking hands with rat urine disease patient)

0.85 (0.16)

0.69 (0.10)

0.57

46.87

< 0.001

K6 Pesakit kencing tikus akan mengalami tanda-tanda berikut: (Rat urine disease patients will experience following symptoms:)

K6i Demam (Fever)

−1.07 (0.08)

2.19 (0.22)

0.91

38.43

< 0.001

K6ii Sakit-sakit badan (Pain)

−0.71 (0.09)

1.33 (0.13)

0.80

81.48

< 0.001

K6iii Mata kuning (jaundis) (Yellow eyes (jaundice))

0.52 (0.09)

1.17 (0.13)

0.76

33.82

< 0.001

K7 Penyakit kencing tikus boleh mengakibatkan: (Rat urine disease patients may result in:)

K7i Kematian (Death)

−1.50 (0.14)

1.22 (0.14)

0.77

24.83

0.002

K7ii Masalah pernafasan (Respiratory problems)

0.32 (0.10)

0.85 (0.11)

0.65

47.94

< 0.001

K7iii Kegagalan buah pinggang (Kidney failure)

0.23 (0.10)

0.80 (0.11)

0.63

29.95

< 0.001

K7iv Kerosakan hati (Damage to the liver)

0.38 (0.11)

0.76 (0.10)

0.60

34.10

< 0.001

K8 Penyakit kencing tikus boleh dicegah dengan: (Rat urine disease can be prevented by:)

K8i Pastikan persekitaran rumah bersih daripada sampah (Make sure home environment is clean from garbage)

−2.35 (0.32)

0.73 (0.11)

0.59

129.43

< 0.001

K8ii Elak diri dari mengharung air banjir (Avoid wading through floods)

−1.69 (0.26)

0.63 (0.10)

0.53

75.66

< 0.001

K8iii Jaga kebersihan diri (Keep personal hygiene)

−2.00 (0.26)

0.76 (0.11)

0.60

89.71

< 0.001

K8iv Minum air yang bersih (Drink clean water)

−2.30 (0.31)

0.74 (0.11)

0.59

91.10

< 0.001

K8v Pakai sarung tangan getah semasa bekerja (Wear rubber gloves at work)

−1.20 (0.20)

0.62 (0.09)

0.53

53.59

< 0.001

K8vi Elak mandi di kawasan air terjun/lata/jeram/sungai/tasik/tali air yang tercemar (Avoid bathing in contaminated waterfalls/ rapids/rivers/lakes/waterways)

−2.09 (0.22)

1.05 (0.13)

0.72

14.97

0.060

  1. a discrimination, b difficulty, df degree of freedom, IRT item response theory, SE standard error, χ2 chi-square, λ standardized loading
  2. Items with P values < 0.05 in the assessment of the item fit are highlighted in bold
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BMC Public Health

ISSN: 1471-2458

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