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Table 4 Leave-one-out cross validation (LOOCV) of the exposure-response model

From: Perceived annoyance from environmental odors and association with atmospheric ammonia levels in non-urban residential communities: a cross-sectional study

Validation region Measured annoyance prevalence[a] LOOCV from NH3 measurements[b] LOOCV from NH3 estimations[c]
Predicted annoyance prevalence Absolute error Relative error,% Predicted annoyance prevalence Absolute error Relative error,%
I 0 0.04 0.04 - 0.01 0.01 -
II 0.34 0.33 −0.02 −5.1 0.27 −0.07 −20
III 0.27 0.28 0.01 3.3 0.25 −0.02 −6.9
IV 0.53 0.56 0.03 5.1 0.42 −0.11 −20
V 0.68 0.65 −0.03 −4.5 0.56 −0.12 −18
  1. [a] Expressed as the proportion of respondents annoyed by odors at each validation region, as obtained from questionnaire responses.
  2. [b] R2 > 0.99 and p-value < 0.05 in all models.
  3. [c] R2 > 0.93 and p-value < 0.05 in all models.