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Table 3 The association between double kernel density (DKD) of lung and NHL morbidity rates (cases per 100,000 residents) and distance to the revealed exposure sources (Method—multivariate regression, distance variables—quadratic wind-adjusted distance terms; interaction terms added)c

From: Spatial identification of potential health hazards: a systematic areal search approach

Variables Model 5 Model 6 Model 7
Ba and (tb) Ba and (tb) Ba and (tb)
A. Lung cancer
 (Constant) −15.663 (−7.937*) −15.125 (−4.832*) −15.791 (−4.948*)
 Distance 0.004 (8.591*) 0.004 (9.314*) 0.004 (8.109*)
 Distance2 −2.689E−07 (−8.258*) −2.945E−07 (−9.067*) −2.715E−07 (−7.587*)
 No. of reference points 1000 1000 1000
 \( {\text{R}}^{2} \) 0.478 0.480 0.480
 \( {\text{R}}_{\text{adjusted}}^{2} \) 0.470 0.471 0.472
 F 56.308* 56.582* 56.790*
B. NHL cancer
 (Constant) −9.890 (−4.709*) −9.233 (−4.402*) −10.001 (−4736*)
 Distance 0.003 (13.563*) 0.003 (13.119*) 0.003 (12.436*)
 Distance2 −2.438E−07 (−12.930*) −2.457 (−11.995*) −2.486E−07 (−11.079*)
 No. of reference points 1000 1000 1000
 \( {\text{R}}^{2} \) 0.373 0.374 0.374
 \( {\text{R}}_{\text{adjusted}}^{2} \) 0.364 0.364 0.364
 F 39.311* 39.288* 36.704*
  1. See comments to Table 2
  2. Model 5: Multivariate quadratic model with the Side of Mountain Carmel vs. elevation above the sea level interaction term
  3. Model 6: Multivariate quadratic model with the Side of Mountain Carmel vs. Distance to the identified hotspot interaction term
  4. Model 7: Multivariate quadratic model with both interaction terms added