. 2018 Apr 18;16:67. doi: 10.1186/s12955-018-0899-6

Table 3.

Items in the Social Health Scale for the Elderly after selection

Variable	Correlation coefficient ^[1]	Standardized Cronbach’s α ^[2]	Correlation coefficient^[3]	Z value^[4]	Factor loading ^[5]	Results (“√” = be retained)
Variable	Correlation coefficient ^[1]	Standardized Cronbach’s α ^[2]	Correlation coefficient^[3]	Z value^[4]	Factor loading ^[5]	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^*	√	√

N = 430

^* The related item was appropriate to be retained after analyzing by one of selection method

^[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

^[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

^[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

^[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

^[5] Factor analysis: If the factor loading of some item was larger than 0.40, then the related item was appropriate to be retained

^[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

^[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