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Table 2 Details of quartiles of the 3-PBA level

From: Association between pyrethroid exposure and osteoarthritis: a national population-based cross-sectional study in the US

3-PBA

Geometric mean (CI)

Median

Interquartile range

Urinary volume-based, µg/L

Q1

0.08 (0.08, 0.08)

0.07

(0.07, 0.07)

Q2

0.27 (0.26, 0.27)

0.28

(0.21, 0,35)

Q3

0.68 (0.67, 0.69)

0.68

(0.54, 0.85)

Q4

3.24 (3.04, 3.45)

2.45

(1.54, 5.51)

Urinary creatinine-corrected, µg/g

Q1

0.09 (0.09, 0.10)

0.10

(0.06, 0.15)

Q2

0.30 (0.30, 0.30)

0.30

(0.25, 0.36)

Q3

0.63 (0.62, 0.64)

0.63

(0.51, 0.78)

Q4

2.93 (2.77, 3.09)

2.29

(1.44, 5.04)

  1. Abbreviations: 3-PBA, 3-phenoxybenzoic acid; CI, confidence interval; Q, quartile