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Table 3 Linear regression model of year-4 physical component score among females (n = 1392)

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 (PCS 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 0.45 (0.19, 0.71) 0.001 0.36 (0.11, 0.62) 0.07 0.006
SSS-Community 0.20 (− 0.03, 0.43) 0.081 0.21 (− 0.02, 0.43) 0.04 0.072
Baseline PCS 0.42 (0.37, 0.47) < 0.001 0.35 (0.30, 0.41) 0.32 < 0.001 0.35 (0.30, 0.41) 0.32 < 0.001
Demographics
 Age − 0.03 (− 0.12, 0.07) 0.554    
 Education   0.012    0.053    0.027
  No schooling 1.00   1.00    1.00   
  At least some primary school 1.06 (0.00, 2.13)   0.90 (−0.16, 1.96) 0.05   1.00 (− 0.04, 2.05) 0.05  
  At least some secondary school 2.50 (0.97, 4.02)   1.48 (−0.08, 3.03) 0.05   1.85 (0.35, 3.36) 0.07  
  At least some university/ college 0.40 (−1.53, 2.34)   −0.94 (−2.90, 1.03) − 0.03   − 0.61 (− 2.53, 1.31) −0.02  
 Currently married −0.84 (− 1.77, 0.10) 0.078 0.01 (− 1.11, 1.13) 0.00 0.983 0.13 (−0.97, 1.22) 0.01 0.821
Well-being factors
 PASE Score (IQR) −0.11 (−1.20, 0.97) 0.836
 Currently living alone −1.40 (−2.57, − 0.22) 0.020 −1.17 (− 2.34, 0.01) −0.05 0.052 −1.09 (− 2.25, 0.07) − 0.05 0.065
Medical history
 Diabetes −2.74 (−4.10, − 1.38) < 0.001 −2.09 (−3.45, − 0.73) − 0.08 0.003 −2.42 (− 3.77, − 1.08) − 0.09 < 0.001
 Hyperthyroidism −0.12 (− 2.26, 2.02) 0.913
 Hypothyroidism −1.00 (− 4.00, 1.99) 0.512
 Osteoporosis −0.67 (− 2.33, 1.00) 0.431
 History of stroke −1.56 (− 4.18, 1.06) 0.242
 Hypertension −0.94 (− 1.88, − 0.01) 0.047 −0.28 (− 1.23, 0.67) −0.02 0.566 −0.32 (− 1.26, 0.63) 0.02 0.512
 CVD conditions −2.79 (− 4.04, − 1.55) < 0.001 −2.30 (− 3.54, − 1.06) −0.09 < 0.001 −2.26 (− 3.49, − 1.03) −0.09 < 0.001
 COPD 0.07 (− 2.11, 2.26) 0.948
 Current alcohol use −0.05 (− 2.85, 2.76) 0.973
 Ever smoked − 1.76 (− 3.39, − 0.12) 0.036 −0.71 (− 2.36, 0.95) − 0.02 0.401 − 0.04 (− 1.02, 0.95) −0.00 0.943
 History of starvation −0.55 (− 1.53, 0.43) 0.273
 BMI > = 30 −5.05 (− 7.54, − 2.55) < 0.001 −3.98 (− 6.45, − 1.51) − 0.08 0.002 −4.24(− 6.72, − 1.76) − 0.08 0.001
 Walking speed (m/sec) 7.35 (5.02, 9.68) < 0.001 6.52 (4.12, 8.92) 0.14 < 0.001 6.64 (4.28, 9.00) 0.14 < 0.001
  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 1.010 to 1.116, R square 0.192
  3. SSS-Community: VIF range 1.010 to 1.119, R square 0.189