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Table 5 Estimation of factor loadings and MIRT parameters of items using the pooled panel data

From: Quantifying traditional Chinese medicine patterns using modern test theory: an example of functional constipation

 

Pearson’s correlation

Factor loadings

MIRT parameters

λ 1 (SE)

λ 2 (SE)

a 1 (SE)

a 2 (SE)

d 1 (SE)

d 2 (SE)

d 3 (SE)

1. Dry and hard stool

0.76*

0.76 (0.07)*

0.70 (0.07)*

2.67 (0.31)*

1.54 (0.23)*

3.07 (0.30)*

−1.56 (0.20)*

−5.96 (0.45)*

2. Prolonged interval of spontaneous defecation

0.73*

0.70 (0.07)*

0.48 (0.09)*

2.20 (0.24)*

1.50 (0.20)*

1.70 (0.20)*

−3.09 (0.23)*

−6.36 (0.46)*

3. Sensation of incomplete evacuation

0.65*

0.70 (0.06)*

0.32 (0.11)#

1.85 (0.17)*

0.86 (0.18)*

2.60 (0.20)*

−1.24 (0.14)*

−5.56 (0.40)*

4. Defecation pain

0.78*

0.64 (0.08)*

0.53 (0.10)*

1.97 (0.20)*

1.62 (0.21)*

1.75 (0.18)*

−1.53 (0.17)*

−5.57 (0.32)*

5. Difficult bowel movement

0.82*

0.68 (0.08)*

0.56 (0.10)*

2.46 (0.26)*

2.02 (0.25)*

3.31 (0.27)*

−0.67 (0.19)*

−5.26 (0.38)*

6. Abdominal distension

0.77*

0.54 (0.08)*

0.60 (0.08)*

1.57 (0.16)*

1.73 (0.18)*

2.13 (0.18)*

−1.36 (0.15)*

−6.12 (0.38)*

7. Reduced appetite

0.73*

0.43 (0.09)*

0.65 (0.08)*

1.17 (0.16)*

1.79 (0.19)*

0.31 (0.13)*

−2.51 (0.18)*

−5.52 (0.35)*

8. Dry mouth and throat

0.73*

0.25 (0.09)#

0.79 (0.05)*

0.78 (0.17)*

2.45 (0.22)*

1.44 (0.17)*

−2.07 (0.20)*

−6.06 (0.46)*

9. Sweaty palm and planta; distracted feeling

0.69*

0.13 (0.13)

0.88 (0.06)*

0.50 (0.25)#

3.35 (0.52)*

0.16 (0.20)*

−3.91 (0.51)*

−8.04 (0.98)*

10. Tea-colored urine, reduced urine volume

0.64*

0.22 (0.10)#

0.71 (0.06)*

0.57 (0.16)*

1.82 (0.18)*

0.62 (0.13)*

−2.75 (0.20)*

−6.70 (0.55)*

  1. SE standard error. λ i : factor i. a i : discrimination parameter of dimension i. d j : easiness parameter of category j of an item
  2. # P <0.05. *P <0.01
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BMC Complementary Medicine and Therapies

ISSN: 2662-7671

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