Table 3.

Exploratory Factory Analysis Using Ratings of Symptom Occurrence

	Factor 1	Factor 2	Factor 3	Factor 4
Symptom	Gastrointestinal Cluster	Psychological Cluster	Pain Cluster	Body Image Cluster
Nausea or vomiting	0.888 ^a	0.018	−0.163	−0.144
Diarrhea or loose bowel movements	0.599 ^a	0.028	−0.105	0.028
Loss of appetite or a change in the taste of food	0.506 ^a	0.091	−0.033	0.128
Fever, chills, or sweats	0.496 ^a	−0.075	0.245	−0.071
Felt nervous or anxious	0.067	0.779 ^a	−0.178	−0.004
Felt sad, down, or depressed	−0.007	0.750 ^a	−0.082	0.008
Difficulty falling or staying asleep	0.048	0.465 ^a	0.066	−0.032
Fatigue or loss of energy	−0.067	0.460 ^a	0.235	−0.041
Pain, numbness or tingling in the hands or feet	−0.093	−0.066	0.775 ^a	0.025
Muscle aches or joint pain	−0.049	0.005	0.593 ^a	0.075
Feeling dizzy or lightheaded	0.334	0.042	0.477 ^a	−0.134
Changes in the way your body looks such as fat deposits or weight gain	−0.186	−0.033	0.067	0.686 ^a
Problems with weight loss or wasting	0.210	−0.095	−0.030	0.515 ^a
Hair loss or changes in the way your hair looks	0.156	−0.043	−0.023	0.490 ^a
Problems with having sex, such as loss of interest or lack of satisfaction	−0.073	0.187	−0.029	0.467 ^a
Trouble remembering	0.074	0.320	0.150	0.073
Skin problems, such as rash, dryness, or itching	0.289	0.032	0.122	0.105
Headache	0.332	0.020	0.218	−0.029
Bloating, pain, or gas in your stomach	0.349	0.004	0.124	0.187
Cough or trouble catching your breath	0.397	0.039	0.120	0.102
Total number of symptoms in the cluster	4	4	3	4

Extraction method: Unweighted least squares. Rotation method: Promax oblique rotation.

Factor loadings ≥ 0.4 are in bold. Items were allowed to load on more than on factor.