Table 3 Summary of results of bifactor analyses

SQ01

I have a good relationship with my family

0.931

0.900

0.895

0.908

0.884

SQ32

I have someone to talk to about my problems

0.792

0.803

0.796

0.801

0.952

SQ39

I live harmoniously with others

0.790

0.800

0.796

0.798

0.941

SQ11

I communicate well with my family

0.940

0.921

0.915

0.926

0.918

SQ02

I participate in family activities

0.757

0.769

0.765

0.769

0.952

SQ33

I have someone who can provide me with information if I need it

0.777

0.789

0.785

0.786

0.974

SQ10

I take care of my family

0.772

0.768

0.775

0.782

0.835

SQ40

I communicate well with others

0.841

0.843

0.847

0.844

0.847

SQ12

I keep in touch with my family

0.879

0.864

0.870

0.878

0.897

SQ07

My family is willing to help with my daily tasks (e.g. shopping, giving me a ride, or helping me with household tasks) when I need it

0.700

0.711

0.709

0.712

0.922

SQ16

I keep in touch with my friends

0.762

0.689

0.699

0.671

0.598

SQ34

I know that I have someone to help me if I have financial difficulties

0.680

0.667

0.661

0.652

0.826

SQ41

I keep in touch with others

0.812

0.780

0.787

0.768

0.788

SQ04

I feel loved and cared for by my family

0.858

0.849

0.855

0.866

0.900

SQ08

My family is willing to give me information when I need it

0.835

0.828

0.831

0.841

0.895

SQ17

I communicate well with my friends

0.766

0.756

0.770

0.754

0.844

SQ43

I am able to socialize with others

0.718

0.702

0.717

0.701

0.798

SQ45

I feel loved and cared for

0.852

0.863

0.871

0.872

0.971

SQ31

I have someone I can go to for advice if I need it

0.763

0.757

0.744

0.749

0.703

SQ35

I give help to others

0.712

0.700

0.703

0.693

0.813

SQ44

I have someone who would spend time with me when I need company

0.827

0.822

0.815

0.811

0.858

SQ05

Overall, my family supports me when I need it

0.835

0.826

0.820

0.833

0.858

SQ18

I have gatherings with my circle of friends

0.686

0.630

0.628

0.606

0.607

SQ15

I give support to my friends

0.674

0.647

0.651

0.635

0.771

SQ37

I get along well with others

0.750

0.759

0.763

0.761

0.967

SQ06

My family is willing to listen when I need to talk about my worries and problems

0.788

0.783

0.774

0.788

0.830

SQ20

I spend time with my friends

0.670

0.598

0.600

0.576

0.536

SQ48

Overall, I am satisfied with the support I get from my friends

0.741

0.715

0.695

0.680

0.712

SQ50

Overall, I am satisfied with the support I give to others

0.753

0.732

0.705

0.694

0.662

SQ51

Overall, I am satisfied with how well I communicate with others

0.797

0.793

0.770

0.767

0.806

2.6

2.8

3.6

0.855

0.828

0.805

0.983

0.985

0.984

0.995

0.992

0.985

0.072

0.057

0.049