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Table 3 Items in the Social Health Scale for the Elderly after selection

From: The development of the social health scale for the elderly

Variable

Correlation coefficient [1]

Standardized Cronbach’s α [2]

Correlation coefficient[3]

Z value[4]

Factor loading [5]

Results (“√” = be retained)

Long form [6]

Short form [7]

B01

0.2951

0.7717*

0.4362*

6.5122*

0.4777*

√

 

B02

0.1501

0.7670*

0.5771*

7.6243*

0.6941*

√

 

B03

0.1050

0.7638*

0.6478*

8.8509*

0.6898*

√

 

B04

0.3028*

0.7638*

0.6636*

9.3755*

0.6358*

√

√

B05

0.4883*

0.7634*

0.6433*

8.8892*

0.5528*

√

√

B06

0.1993

0.7625*

0.6239*

9.8041*

0.6058*

√

 

B07

0.3132*

0.7669*

0.5304*

7.7367*

0.5998*

√

√

B08

0.3704*

0.7689*

0.3908

6.6259*

0.3958

  

B09

0.1248

0.7619*

0.5238*

9.6481*

0.4996*

√

 

B10

0.2145

0.7687*

0.4658*

7.2698*

0.6026*

√

 

B11

0.1076

0.7659*

0.5189*

8.3519*

0.6479*

√

 

B12

0.4287*

0.7719*

0.4605*

5.6679*

0.4910*

√

√

B13

0.5114*

0.7754*

0.2266

3.0738*

0.6257*

√

 

B14

0.1537

0.7701*

0.3443

5.5538*

0.5017*

  

B15

0.5956*

0.7839

0.2181

0.6658

0.6637*

  

B16

0.3743*

0.7833

0.1110

1.8150

0.6253*

  

B17

0.6986*

0.7752*

0.4340*

4.3566*

0.1904

√

 

B18

0.3985*

0.7788

0.2065

3.1371*

0.3861

  

B19

0.3729*

0.7690*

0.5217*

7.7453*

0.5102*

√

√

B20

0.4263*

0.7704*

0.4233*

6.2262*

0.4694*

√

√

B21

0.5608*

0.7727*

0.5755*

7.0495*

0.6480*

√

√

B22

0.3586*

0.7732*

0.3726

5.0186*

0.6386*

√

 

B23

0.4078*

0.7747*

0.2380

3.6880*

0.3728

  

B24

0.4036*

0.7701*

0.3664

7.6728*

0.3398

  

B25

−0.0693

0.7817

0.0964

0.6503

0.6128*

  

B26

0.0981

0.7811

0.0736

1.5413

0.6299*

  

B27

0.1912

0.7745*

0.3755

4.6316*

0.6877*

  

B28

0.5721*

0.7750*

0.4149*

4.8409*

0.4470*

√

√

B29

0.4121*

0.7733*

0.3727

5.1077*

0.3892

  

B30

0.1868

0.7717*

0.3145

5.1113*

0.4890*

  

B31

0.3664*

0.7795

0.2044

− 0.7260

0.4446*

  

B32

0.3289*

0.7756*

0.4758*

3.2981*

0.4370*

√

√

B33

0.6003*

0.7696*

0.5738*

6.2249*

0.5290*

√

√

B34

0.1267

0.7738*

0.3069

3.2000*

0.7324*

  

B35

0.5312*

0.7725*

0.5139*

5.6521*

0.6615*

√

√

B36

0.4733*

0.7765*

0.4241*

3.8774*

0.6434*

√

√

B37

0.2295

0.7731*

0.4523*

5.1986*

0.6925*

√

 

B38

0.5854*

0.7757*

0.4700*

3.9140*

0.6335*

√

√

B39

0.3592*

0.7848

0.1114

− 1.2338

0.4136*

  

B40

0.5565*

0.7689*

0.5480*

6.7172*

0.5877*

√

√

  1. N = 430
  2. * The related item was appropriate to be retained after analyzing by one of selection method
  3. [1] Test-retest reliability analysis: if the Spearman rank correlation coefficient was larger than 0.30 (P < 0.05), then the related item was appropriate to be retained
  4. [2] Cronbach’s alpha analysis: If the standardized Cronbach’s α of scale was less than that after eliminating some item, than the related item was not appropriate to be retained
  5. [3] Correlation analysis: Comparing the score of some item with that of dimension it belonged to. If the Spearman rank correlation coefficient was larger than 0.40 (P < 0.05), then the related item was appropriate to be retained
  6. [4] Distinguishability analysis: Comparing the raw scores of some item between the high-score group of scale (P75) and low-score group of scale (P25). If the P-value of Wilcoxon rank sum test was less than 0.05, then the related item was appropriate to be retained
  7. [5] Factor analysis: If the factor loading of some item was larger than 0.40, then the related item was appropriate to be retained
  8. [6] If less than 2 selection methods indicated that some item was not appropriate to be retained, than the related item would be retain in the long form
  9. [7] If each selection method indicated that some item was appropriate to be retained, than the related item would be retain in the short form
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Health and Quality of Life Outcomes

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