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Table 5 Age-period and age-cohort models of PPY

From: Age, period and cohort analysis of patient dental visits in Australia

  Age-period model Age-cohort model
  Parameter estimate SE P Parameter estimate SE P
Age group       
20-24 -575.72 167.87 0.0006 -227.75 183.01 0.21
25-29 -215.46 91.67 0.0188 21.21 97.33 0.83
30-34 0.00    0.00   
35-39 81.60 91.10 0.3705 -148.17 94.88 0.12
40-44 259.74 92.16 0.0049 -163.53 99.14 0.10
45-49 168.54 94.43 0.0744 -447.04 105.24 <.0001
50-54 200.62 96.90 0.0385 -623.58 112.21 <.0001
55-59 197.47 104.71 0.0594 -811.74 131.32 <.0001
60-64 -85.57 114.86 0.4563 -1244.09 144.70 <.0001
65-69 -685.31 152.71 <.0001 -2006.21 185.03 <.0001
70-74 -805.75 199.77 <.0001 -2291.59 245.17 <.0001
75-79 -465.99 341.60 0.1726 -2067.34 392.57 <.0001
80-84 -2153.59 546.17 <.0001 -3731.77 620.80 <.0001
85-89 -2104.31 1170.04 0.0722 -2054.34 1167.05 0.08
Period       
1983 993.34 85.61 <.0001    
1988 706.21 79.16 <.0001    
1993 409.65 80.80 <.0001    
1998 188.70 79.83 0.0182    
2003 107.99 76.62 0.1588    
2009 0.00      
Cohort       
80-84 (a) -   - 648.55 958.64 0.50
75-79 (a) -   - 1267.25 686.92 0.07
70-74 (a) -   - 1393.63 356.46 <.0001
65-69 (a) -   - 1223.43 274.77 <.0001
60-64 (a) -   - 1175.36 161.98 <.0001
50-59 (a) -   - 772.51 153.49 <.0001
45-49 (a) -   - 833.53 137.42 <.0001
40-44 (a) -   - 690.22 117.07 <.0001
35-39 (a) -   - 551.33 102.35 <.0001
30-34 (a) -   - 545.69 92.84 <.0001
25-29 (a) -   - 0.00   
20-24 (a) -   - -330.88 89.43 0.00
20-24 (b) -   - -352.63 102.26 0.00
20-24 (c) -   - -539.13 114.43 <.0001
20-24 (d) -   - -778.79 131.20 <.0001
20-24 (e) -   - -847.71 162.35 <.0001
20-24 (f)     -793.63 455.75 0.08
  1. Note: a = period 1 (1983), b = period 2 (1988), c = period 3 (1993), d = period 4 (1998), e = period 5 (2003), f = period 6 (2009).