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Table 5 Multivariable linear regression between different domains of SF-36 and SOC-13, gender, conditions and diseases

From: Dizziness and health-related quality of life among older adults in an urban population: a cross-sectional study

SF-36 domain Variable Estimate CI R-square p value
Physical functioning Intercept 88.3    
Female sex − 5.9 − 10.2, − 1.6 0.24 0.007
Dizziness − 6 − 10.3, − 1.6   0.007
Diabetes − 10.7 − 16.9, − 4.4   0.0009
Lung disease − 13.4 − 19.7, − 7.1    < 0.0001
Vision impairment − 6.7 − 11.1, − 2.3   0.003
Joint/back problem − 14.8 − 19.5, − 10.2    < 0.0001
Role physical Intercept 30.3    
SOC− 13 total score 0.7 0.26, 1.1 0.14 0.001
Heart disease − 12.8 − 21.8, − 4.0   0.005
Vision impairment − 10.7 − 18.8, − 2.6   0.01
Joint/back problem − 16.9 − 25.1, − 8.7    < 0.0001
Bodily pain Intercept 56.7    
Dizziness − 8.2 − 12.8, − 3.6 0.31 0.0005
SOC− 13 total score 0.4 0.18, 0.63   0.0004
Vision impairment − 6.3 − 11.0, − 1.7   0.008
Joint/back problem − 23 − 28.5, − 18.7    < 0.0001
General health Intercept 60.9    
SOC-13 total score 0.3 0.1, 0.5 0.36 0.0003
Diabetes − 6.9 − 11.8, − 1.9   0.007
Lung disease − 7.05 − 12.1, − 2.0   0.006
Heart disease − 10.5 − 14.4, − 6.7    < 0.0001
Vision impairment − 5.6 − 9.0, − 10.1   0.002
Joint/back problem − 13.6 − 17.1, − 10.1    < 0.0001
Vitality Intercept 32.6    
Dizziness − 6.4 − 10.4, − 2.4 0.3 0.002
SOC-13 total score 0.7 0.5, 0.9    < 0.0001
Heart disease − 7.7 − 12.1, − 3.3   0.0008
Vision impairment − 5.7 − 9.8, − 1.7   0.006
Joint/back problem − 8.5 − 12.7, − 4.3    < 0.0001
Social functioning Intercept 45    
SOC-13 total score 0.6 0.4, 0.8 0.11  < 0.0001
Joint/back problem − 9.2 − 13.6, − 4.7    < 0.0001
Role emotional Intercept 13.8    
SOC-13 total score 1 0.6, 1.4 0.1  < 0.0001
Diabetes − 15.4 − 26.3, − 4.5   0.006
Mental health Intercept 11.7    
SOC-13 total score 1 0.8, 1.1 0.28  < 0.0001
Joint/back problem − 5.8 − 9.1, − 2.5   0.0007
  1. Multivariable linear regression between different domains of Short form Health Survey questionnaire (SF-36) and sense of coherence (SOC-13), self-rated health (SRH), gender, conditions and diseases remaining after backward elimination process using exclusion criteria p > 0.01
  2. Predictors included in the first step of the backward selection were female sex, dizziness, Sense of Coherence (SOC total score), diabetes, hypertension, hyper or hypothyroidism, lung disease (chronic bronchitis, asthma, chronic obstructive pulmonary disease), cardiac infarction/heart failure, prior stroke, vision or hearing impairment and joint/back problems