Table 1.

Coefficients and statistics for the inhalable dust concentration models

	Model used in study 1 (Schlünssen et al., 2001b)	Model used in study 2
Coefficient (95% CI), intercept	−0.03 (−0.15; 0.09)	−0.04 (−0.12; 0.04)
Coefficient (95% CI), upward foil	0.64 (0.50; 0.78)	0.50 (0.40; 0.60)
Coefficient (95% CI), forward foil	−0.001 (−0.10; 0.09)	0.02 (−0.05; 0.10)
Coefficient (95% CI), downward foil	−0.02 (−0.12; 0.08)	—
Coefficient (95% CI), study-specific intercept, upward foil	—	−0.16 (−0.24; −0.08)
Adjusted R2	0.62	0.62
Number of calibration measurements	109	236

CI, confidence interval.