. Author manuscript; available in PMC: 2013 Jul 9.

Published in final edited form as: Pediatrics. 2010 May 17;125(6):e1270–e1277. doi: 10.1542/peds.2009-3058

Table 4.

Odds ratio for any ADHD subtype by level of creatinine-adjusted urinary dimethylthiophosphate concentration (n=1,139)

Dimethylthiophosphate concentration	Cases identified with the DISC-IV (n=119)		Cases identified with the DISC-IV or ADHD-medicated (n=148)
Dimethylthiophosphate concentration	Crude OR [95% CI]	Adjusted OR¹ [95% CI]	Crude OR [95% CI]	Adjusted OR¹ [95% CI]
Below detection limit (n=407)	1.0 (reference)
Lower median² (n=366)	1.11 [0.63–1.97]	1.05 [0.57–1.95]	1.36 [0.76–2.44]	1.22 [0.65–2.27]
Higher median³ (n=366)	1.83 [1.18–2.82]	1.93 [1.23–3.02]	2.04 [1.30–3.22]	2.12 [1.32–3.41]

Abbreviations: ADHD, attention deficit/hyperactivity disorder; CI, confidence interval; OR, odds ratio

Adjusted for sex, age, race/ethnicity, poverty-income ratio, and fasting duration

Range0.96–30.46 nmol×g of creatinine/L, median 11.26 nmol×g of creatinine/L

Range 30.47–7932.06 nmol×g of creatinine/L, median 97.63 nmol×g of creatinine/L