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Table 2 Characteristics of participants by SCD-Q9 scorea

From: U-shaped association between sleep duration and subjective cognitive complaints in Chinese elderly: a cross-sectional study

Variables Groups Overall score of SCD-Q9 Overall memory function and time comparison score Daily activity ability score
Median(Q1,Q3) P Median(Q1,Q3) P Median(Q1,Q3) P
Age (years) ≤ 70 3.00(1.00,5.00) < 0.001 2.00(1.00,3.00) < 0.001 1.0(0.00,2.50) < 0.001
> 70 4.50(2.50,6.00)   3.00(1.00,4.00)   1.5(0.50,2.50)  
Gender Male 3.00(1.00,5.00) < 0.001 2.00(0.00,3.00) < 0.001 1.00(0.00,1.50) < 0.001
Female 4.50(2.50,6.00)   3.00(1.00,4.00)   2.50(0.50,2.50)  
Residence Community 3.00(1.00,5.00) < 0.001 3.00(1.00,4.00) < 0.001 1.00(0.00,1.50) < 0.001
Nursing home 5.50(3.50,6.50)   3.00(2.00,4.00)   2.00(1.00,2.50)  
Education level Primary school or lower 5.50(3.50,6.50) < 0.001 3.00(2.00,4.00) 0.001 2.00(1.00,3.00) < 0.001
Junior high school 3.50(1.00,6.00)   3.00(1.00,4.00)   1.00(0.00,2.50)  
Senior high school 3.50(1.00,5.50)   3.00(1.00,4.00)   1.00(0.00,2.00)  
College or higher 4.00(1.50,5.50)   3.00(1.00,4.00)   1.00(0.125,2.00)  
Cohabitation Married/Cohabitant 3.50(1.00,5.50) < 0.001 3.00(1.00,4.00) < 0.001 1.00(0.00,2.00) < 0.001
Widowed/separated/single 5.00(2.50,6.50)   3.00(1.00,4.00)   1.50(1.00,2.50)  
Monthly income (yuan) < 3500 3.50(1.00,6.00) 0.009 2.00(0.00,4.00) 0.001 1.50(0.50,2.50) 0.025
3500 to 5999 4.00(1.50,5.50)   3.00(1.00,4.00)   1.00(0.00,2.00)  
≥ 6000 5.00(3.00,6.00)   2.00(1.00,4.00)   1.50(0.50,2.50)  
Current smoking Yes 1.50(0.00,3.75) < 0.001 1.00(0.00,4.00) < 0.001 0.50(0.00,1.50) < 0.001
No 4.00(2.00,6.00)   3.00(1.00,4.00)   1.50(0.50,2.50)  
Alcohol consumption Yes 2.50(0.50,4.50) 0.002 1.00(0.00,3.00) 0.009 0.50(0.00,1.50) 0.003
No 4.00(1.50,6.00)   3.00(1.00,4.00)   1.50(0.50,2.50)  
Tea-drinking habit Yes 3.00(1.00,5.50) < 0.001 2.00(0.00,4.00) < 0.001 1.00(0.00,2.00) < 0.001
No 4.50(2.00,6.00)   3.00(1.00,4.00)   1.50(0.50,2.50)  
Exercise frequency Hardly 4.00(1.00,6.00) 0.960 3.00(1.00,4.00) 0.924 1.00(0.375,2.50) 0.910
Occasionally 4.00(1.00,6.50)   3.00(1.00,4.00)   1.00(0.00,2.50)  
Frequently 4.00(1.50,5.50)   3.00(1.00,4.00)   1.50(0.50,2.00)  
BMI (kg/m2) <  18.5 5.50(3.00,6.50) 0.043 3.00(1.00,4.00) 0.154 1.50(1.00,2.50) 0.026
18.5 to 24 4.00(1.50,6.00)   3.00(1.00,4.00)   1.00(0.50,2.375)  
≥ 24 4.00(1.50,5.50)   3.00(1.00,4.00)   1.00(0.25,2.00)  
Napping habit Yes 4.50(1.50,6.00) 0.002 3.00(1.00,4.00) < 0.001 1.50(0.25,2.50) 0.030
No 3.00(1.00,5.00)   2.00(1.00,3.00)   1.00(0.00,2.00)  
Hypertension Yes 4.00(1.87,6.00) 0.250 3.00(1.00,4.00) 0.165 1.00(0.00,2.125) 0.576
No 3.50(1.00,6.00)   3.00(1.00,4.00)   1.5(0.50_,2.125)  
Diabetes Yes 4.50(2.00,6.00) 0.166 3.00(1.00,4.00) 0.241 1.50(0.50,2.50) 0.200
No 4.00(1.50,5.50)   3.00(1.00,4.00)   1.00(0.50,2.00)  
Depression symptoms Yes 5.50(4.00, 7.00) < 0.001 4.00(3.00,4.00) < 0.001 2.00(1.00,3.00) < 0.001
No 3.50(1.00,5.50)   3.00(1.00,4.00)   1.00(0.00,2.00)  
Anxiety symptoms Yes 6.00(4.50,7.00) < 0.001 4.00(2.00,4.00) 0.002 2.00(1.50,3.50) < 0.001
No 4.00(1.50,5.50)   3.00(1.00,4.00)   1.00(0.50,2.00)  
  1. Q1 Lower Quartile, Q3 Upper Quartile, SCD-Q9 9-items subjective cognitive decline questionnaire, BMI Body mass index
  2. aData were statistically analyzed using the Mann-Whitney U test and Kruskal-Wallis test