Xiaoqinglong Granules as Add-On Therapy for Asthma: Latent Class Analysis of Symptom Predictors of Response

Table 2

Two latent class models of asthma participants and relative symptoms response probabilities.

Item types (symptom)	Rule  1; Class  1 subset (𝑛=100)	Rule  2; Class  2 subset (𝑛=70)
Qi vacuity	0.8903 ^†	1.0000
Chest tightness	0.7735	0.9672
Aversion to cold	0.6385	0.7454
Clear, pale, or watery phlegm	0.3927	0.9984
Torpid intake	0.3554	0.6935
Coughing	0.8604	1.0000
Fever	0.0000	0.0287
No thirst	0.7481	0.4588
Latent class prevalence	0.5898	0.4102

Note. The model shows the different response patterns of the two rules on different item types. Rule  1; Rule  2.
^†Item-response probabilities > .5 in bold to facilitate interpretation. Item-response probabilities corresponding to a yes response; Qi vacuity: shortness of breath; chest tightness: oppression in the chest, feeling of oppression in the chest; aversion to cold: sensation of cold which cannot be relieved by warmth, also known as chills; clear, pale, or watery phlegm; torpid intake: loss of appetite with no desire for food with decreased intake, the same as poor appetite; coughing: (1) the expelling of air from the lungs suddenly with an explosive noise or expectoration of sputum; (2) any disease mainly manifested by cough; fever: elevation of the body temperature above the normal or subjective feeling of feverishness; no thirst: no feeling of dryness of the mouth with a desire to drink.