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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).