Table 4 PCA loadings for dataset I (sub-table A) and II (sub-table B).

From: Functional phenotypes in schizophrenia spectrum disorders: defining the constructs and identifying biopsychosocial correlates using data-driven methods

Scale: Item (Description/Examples)

Independent Functioning

Social Functioning

Role Functioning

A—Dataset I

   

BSFS: Recreation (frequency; e.g., hobbies, exercise)

0.91

  

BSFS: Independence—Performance (frequency of doing activities, e.g., chores, self-care)

0.76

  

BSFS: Prosocial Activities (frequently participating in society, e.g., going to public places like movies and restaurants, playing sports)

0.62

0.40

 

QoL: Common Objects & Activities (possession of common objects, e.g., wallet, library card; constructive activities, e.g., movies, shopping)

0.60

  

QoL: Intrapsychic (internal drive, e.g., purpose, motivation, curiosity, engagement)

0.38

0.32

0.33

BSFS: Independence—Competence (comfort with activities, e.g., chores, self-care)

0.34

  

BSFS: Interpersonal Communication/Relationships (number and supportiveness of relationships)

 

0.89

 

QoL: Interpersonal Relationships (number and depth of relationships)

 

0.69

 

BSFS: Social Engagement Withdrawal (time spent interacting vs. alone)

 

0.63

 

BSFS: Occupation/Employment (gainful employment or homemaking)

  

0.93

QoL: Instrumental Role (gainful employment, homemaking or educational pursuits)

0.31

 

0.88

B - Dataset II

UPSA: Financial Skills (counting change and paying bills)

0.85

  

UPSA: Communication Skills (making telephone calls)

0.84

  

MSIF: Global Residential Functioning (living independently, doing chores)

0.59

  

SAS: Degree of Social Activity (active initiation)

 

0.91

 

SAS: Social Frequency (frequency of activities)

 

0.87

 

Ham-D: Work and Interests (attitude and ability to sustain work)

  

0.87

SAS: Leisure Activities (interest in constructive pursuits)

  

0.47

MSIF: Global Role Functioning (employment, caretaking or educational pursuits)

 

0.32

0.41

  1. The table shows the Promax rotated component loadings (loadings < 0.3 are masked). The first component, independent functioning, explained \(40.6{\boldsymbol{ \% }}\) and \(27.3{\boldsymbol{ \% }}\) of the variance in Dataset I and II respectively. It was characterized by recreational activities, financial skills, and residential functioning. The component social functioning explained a variance of \(11.2{\boldsymbol{ \% }}\) and \(16.7{\boldsymbol{ \% }}\) and grouped items around social and interpersonal activities. And role functioning explained \(9.0{\boldsymbol{ \% }}\) and \(13.2{\boldsymbol{ \% }}\) of total variance and summarized items of employment and role. Primary loadings are bolded.
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