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Table 3 Evaluation of spatiotemporal IDW interpolation and linear regression models to predict annual historical air pollution.

From: Spatiotemporal air pollution exposure assessment for a Canadian population-based lung cancer case-control study

    

IDW Interpolation

Linear Models

 

Year

Stations

N

R2

RMSE

R2

RMSE

NO 2

All

120

1030

0.22

6.66

0.38

5.92

 

1994-1990

94

349

0.30

5.66

0.36

5.42

 

1989-1985

88

300

0.20

6.61

0.44

5.54

 

1984-1980

62

226

0.13

6.72

0.40

5.62

 

1979-1975

52

155

0.17

8.75

0.29

8.07

PM 2.5

All

177

1826

0.51

2.96

0.30

3.53

 

1994-1990

106

446

0.64

1.96

0.32

2.70

 

1989-1985

113

480

0.57

2.30

0.36

2.81

 

1984-1980

124

476

0.34

3.79

0.12

4.36

 

1979-1975

123

424

0.43

3.32

0.26

3.77

O 3

All

187

1440

0.39

5.29

0.56

4.48

 

1994-1990

158

582

0.53

4.92

0.65

4.25

 

1989-1985

125

409

0.36

5.41

0.54

4.57

 

1984-1980

80

286

0.25

4.67

0.28

4.57

 

1979-1975

48

163

0.22

6.33

0.60

4.50