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Table 3 Levels of cognitive performance and pulse pressure in elderly Chinese participants at each time point

From: Prospective associations between pulse pressure and cognitive performance in Chinese middle-aged and older population across a 5-year study period

Variable 2011 2013 2015
No. of participants Mean ± SD P valuea No. of participants Mean ± SD P valuea No. of participants Mean ± SD P valuea
Cognitive score   F = 127.77, P < 0.001b
Total 9384 10.17 ± 4.34   9132 10.31 ± 4.36   9048 9.80 ± 4.46  
Age, years
 45–59 5071 10.99 ± 4.08 <0.001 5015 11.20 ± 4.07 <0.001 5068 10.73 ± 4.15 <0.001
 60–64 1731 10.26 ± 4.21   1711 10.29 ± 4.15   1704 9.77 ± 4.34  
 65–79 2351 8.76 ± 4.39   2248 8.67 ± 4.49   2138 7.93 ± 4.49  
 80+ 231 5.95 ± 3.98   158 5.82 ± 4.30   138 4.96 ± 4.04  
Sex
 Male 4349 11.19 ± 3.93 <0.001 4253 11.34 ± 3.92 <0.001 4204 10.77 ± 4.05 <0.001
 Female 5030 9.29 ± 4.53 4873 9.42 ± 4.53   4839 8.97 ± 4.62  
Pulse pressure F = 11.09, P < 0.001b
Total 8853 54.98 ± 15.06   7668 55.47 ± 14.87   8171 54.51 ± 14.59  
Age years
 45–59 4563 50.38 ± 11.87 <0.001 4112 50.90 ± 11.96 <0.001 4492 50.06 ± 11.78 <0.001
 60–64 1590 55.87 ± 14.42   1482 56.78 ± 14.30   1528 56.35 ± 13.92  
 65–79 2185 62.29 ± 16.82   1957 62.86 ± 16.48   1992 61.88 ± 16.06  
 80+ 215 71.71 ± 18.38   171 69.64 ± 17.82   159 70.44 ± 20.12  
Sex
 Male 3972 54.31 ± 13.71 <0.001 3577 55.11 ± 13.92 0.045 3768 54.12 ± 14.00 0.026
 Female 4577 55.56 ± 16.11 4086 55.78 ± 15.63 4397 54.84 ± 15.07
  1. aP value was calculated by one-way analysis of variance (ANOVA)
  2. bP value was calculated by one-way repeated measures ANOVA
  3. Owing to missing data for some variables, the number of cases does not always sum to 9750