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Table 4 Linear regression model of year-4 mental component score among males (n = 1542)

From: The effect of subjective social status on health-related quality of life decline in urban Chinese older adults: a four-year longitudinal study from Hong Kong

  Bivariable model (MCS baseline) SSS-Society model SSS-Community model
Factors B Coeff (95% CI) p-value B Coeff (95% CI) Std. Coeff p-value B Coeff (95% CI) Std. Coeff p-value
SSS-Society 0.27 (0.10, 0.43) 0.002 0.29 (0.12, 0.47) 0.08 0.001
SSS-Community 0.13 (− 0.01, 0.27) 0.068 0.12 (− 0.02, 0.26) 0.04 0.092
Baseline MCS 0.32 (0.27, 0.36) < 0.001 0.31 (0.27, 0.36) 0.32 < 0.001 0.29 (0.24, 0.33) 0.30 < 0.001
Demographics
 Age 0.04 (− 0.03, 0.10) 0.297
 Education   0.418    0.310    0.414
  No schooling 1.00   1.00    1.00   
  At least some primary school 0.86 (− 0.59, 2.31)   0.84 (− 0.60, 2.29) 0.07   0.51 (− 0.92, 1.95) 0.04  
  At least some secondary school 0.46 (− 1.05, 1.97)   0.24 (− 1.27, 1.75) 0.02   −0.06 (− 1.56, 1.44) − 0.00  
  At least some university/ college 1.04 (− 0.57, 2.64)   0.69 (−0.92, 2.30) 0.04   0.49 (− 1.11, 2.10) 0.03  
 Currently married −0.94 (− 1.94, 0.05) 0.064 − 0.76 (− 1.75, 0.24) −0.04 0.136 −0.88 (− 1.86, 0.14) −0.04 0.091
Well-being factors
 PASE Score (IQR) 0.21 (−0.48, 0.91) 0.550
 Currently living alone −1.16 (− 2.42, 0.10) 0.071 −0.32 (− 1.85, 1.21) −0.01 0.681 −0.18 (− 1.70, 1.35) −0.01 0.821
Medical history
 Diabetes −0.18 (− 1.05, 0.70) 0.695
 Hyperthyroidism − 1.99 (−4.49, 0.51) 0.118 − 1.06 (−3.76, 1.63) −0.02 0.438 −1.14 (− 3.84,1.56) − 0.02 0.406
 Hypothyroidism −4.75 (−8.19, − 1.31) 0.007 − 4.85 (− 8.27, − 1.43) −0.07 0.005 −4.41 (−7.90, − 0.92) −0.06 0.013
 Osteoporosis −1.92 (− 3.74, − 0.11) 0.038 −1.30 (− 3.13, 0.53) − 0.03 0.162 −1.49 (− 3.31, 0.34) −0.04 0.110
 History of stroke − 2.22 (− 3.68, − 0.75) 0.003 − 2.23 (− 3.68, − 0.78) −0.07 0.003 −1.84 (−3.28, − 0.40) −0.06 0.012
 Hypertension 0.00 (−0.61, 0.62) 0.996
 CVD conditions −0.18 (− 0.98, 0.62) 0.659
 COPD −0.51 (− 1.52, 0.51) 0.328
 Current alcohol use 0.36 (− 0.35, 1.06) 0.317
 Ever smoked 0.09 (−0.54, 0.71) 0.784
 History of starvation −0.56 (− 1.18, 0.06) 0.076 − 0.55 (− 1.17, 0.08) −0.04 0.087 −0.69 (−1.31, − 0.06) −0.05 0.031
 BMI > = 30 0.67 (− 1.46, 2.80) 0.536
 Walking speed (m/sec) 0.24 (− 1.14, 1.62) 0.736
  1. SSS Subjective social status, MCS Mental Component Score, PASE Physical Activity Scale for Elderly, IQR Interquartile range, CVD Cardiovascular diseases, COPD Chronic obstructive pulmonary disease, BMI Body mass index. Values in bold represent those variables retained in the final model. Values not bolded but shown in the final model column represent their value before being removed from the model
  2. SSS-Society: VIF range 1.001 to 1.074, R square 0.121
  3. SSS-Community: VIF range 1.004 to 1.049, R square 0.105