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. Author manuscript; available in PMC: 2019 Nov 4.
Published in final edited form as: Indoor Air. 2018 May 4:10.1111/ina.12471. doi: 10.1111/ina.12471

Table 4.

Intraclass correlations (ICC) and sample size (m) required to estimate temporal variability of pyrethroids over a 6-week period with a reliability of 0.8

Homes with
3 weeks of data		 Homes with at
least 2 weeks of
data		 Homes with
3 weeks of data		 Homes with at
least 2 weeks of
data
ICC m ICC m ICC m ICC m
trans-permethrin 0.75 1.4 0.71 1.7 0.77 1.2 0.73 1.5
cis-permethrin 0.74 1.4 0.74 1.4 0.76 1.3 0.7 1.7
Cypermethrin 0.72 1.6 0.71 1.7 0.94 0.3 0.92 0.3
Esfenvalerate 0.71 1.6 0.8 1 0.87 0.6 0.86 0.6
Deltamethrin 0.82 0.9 0.74 1.4 0.92 0.4 0.89 0.5
Bifenthrin 0.75 1.4 0.55 3.3 0.95 0.2 0.94 0.3
Cyfluthrin 0.84 0.8 0.78 1.2 0.96 0.2 0.88 0.5
Cyhalothrin 0.91 0.4 0.67 2 0.91 0.4 0.86 0.6
All pyrethroids 0.82 0.9 0.74 1.4 0.82 0.9 0.77 1.2
a

n = 50 houses when 2 and 3 sample collection weeks are included. Thirty-nine houses when data for houses having only 3 sample collection weeks, n for non-substituted data is further reduced according to frequency of detection (Table 2).