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. 2007 Oct 30;116(1):78–85. doi: 10.1289/ehp.10531

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Mean anxiety symptom severity at each time point across exposure conditions. Post, postexposure. Change from 70 min to 80 min; 0.05 vs. 5 ppm: p = < 0.0001. Change from 70 min to 100 min; 0.05 vs. 5 ppm: p = 0.01. Change from 70 min to 120 min: 0.05 vs. 5 ppm; p = 0.03. Change from 70 min to 165 min: 0.05 vs. 5 ppm: p = 0.02; 0.5 vs. 5 ppm: p = 0.04. Error bars represent SE.