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. Author manuscript; available in PMC: 2012 Nov 6.
Published in final edited form as: J Toxicol Environ Health A. 2011;74(19):1280–1293. doi: 10.1080/15287394.2011.587106

Table 2.

Spearman rho correlation coefficients for blood lead (PbB) level and distortion product otoacoustic emissions (DPOAE) amplitude at the f2 frequencies 1187, 1500, 1906, 2406, 3031, 3812, 4812, 6031 and 7625 Hz for Pb-exposed Andean Children. N = 102 ears, except at 7625 Hz where N = 45. The values for rho are corrected for ties, and the p-values are tied p-values. NS = non-significant.

Comparison Variables rho P Significance
PbB (µg/dL), DPOAE at f2 1187 Hz 0.104 0.295 NS
PbB (µg/dL), DPOAE at f2 1500 Hz 0.025 0.803 NS
PbB (µg/dL), DPOAE at f2 1906 Hz 0.036 0.715 NS
PbB (µg/dL), DPOAE at f2 2406 Hz −0.114 0.251 NS
PbB (µg/dL), DPOAE at f2 3031 Hz −0.117 0.239 NS
PbB (µg/dL), DPOAE at f2 3812 Hz −0.140 0.161 NS
PbB (µg/dL), DPOAE at f2 4812 Hz −0.147 0.139 NS
PbB (µg/dL), DPOAE at f2 6031 Hz −0.072 0.467 NS
PbB (µg/dL), DPOAE at f2 7625 Hz −0.232 0.123 NS