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Table 2 Adjusted OR (95% CI) and Mean (95% CI) of IADL decline in 3 years for depressive symptoms obtained by multiple logistic regression models

From: Age group differences in association between IADL decline and depressive symptoms in community-dwelling elderly

  Model1baP-values for interactionModel2caP-values for interaction
70s age group80s age group70s age group80s age group
 ORs (95% CI)      
Depressive symptomsNo1 (Ref.)1 (Ref.)0.021 (Ref.)1 (Ref.)0.03
Yes2.11 (1.1, 4.03)0.81 (0.46, 1.4)2.33 (1.13, 4.78)0.85 (0.46, 1.53)
SexMale1 (Ref.)1 (Ref.) 1 (Ref.)1 (Ref.) 
Female0.14 (0.05, 0.31)0.53 (0.31, 0.91) 0.13 (0.04, 0.32)0.58 (0.31, 1.08) 
 Mean (95% CI)      
MoCA-J score 0.85 (0.77, 0.94)0.97 (0.90, 1.05) 0.87 (0.78, 0.97)0.98 (0.9, 1.07) 
Body Mass Index (kg/m2)  1.05 (0.92, 1.19)0.99 (0.9, 1.06) 
 ORs (95% CI)      
History of strokeNo 1 (Ref.)1 (Ref.) 
Yes 2.17 (0.53, 7.41)0.62 (0.1, 2.25) 
History of heart diseaseNo 1 (Ref.)1 (Ref.) 
Yes 1.29 (0.49, 3.12)0.91 (0.4, 1.89) 
HypertensionNo 1 (Ref.)1 (Ref.) 
Yes 0.89 (0.41, 2.01)0.77 (0.43, 1.45) 
DyslipidemiaNo 1 (Ref.)1 (Ref.) 
Yes 0.61 (0.30, 1.25)0.68 (0.38, 1.21) 
DiabetesNo 1 (Ref.)1 (Ref.) 
Yes 1.3 (0.44, 3.39)1.26 (0.48, 2.88) 
Household incomeSatisfaction to neutral 1 (Ref.)1 (Ref.) 
Dissatisfaction 1.24 (0.52, 2.78)1.38 (0.65, 2.76) 
Education 16 years 1 (Ref.)1 (Ref.) 
<  16 years 2.44 (0.92, 7.71)1.28 (0.57, 3.17) 
Solitary livingNo 1 (Ref.)1 (Ref.) 
Yes 0.18 (0.01, 0.95)1.05 (0.50, 2.11) 
  1. Because of missing information of possible confounders, these logistic regression analyses were analyzed by using 537 participants in 70s and 518 in 80s in Model 1, and 482 in 70s and 483 in 80s in Model 2
  2. aInteraction between depressive symptom and age groups (70s/80s). 70s and 80s age groups were combined at the same time to test the interaction
  3. bModel 1 adjusted for sex and MoCA-J score
  4. cModel 2 adjusted for sex, MoCA-J score, Body Mass Index, histories of stroke and heart disease, economic condition, education, hypertension, hyperlipidemia, and diabetes
  5. Abbreviations: OR Odds ratio, CI Confidence interval
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