Table 1 Results of ROC analysis carried out on number of click beetles using the threshold of 15% for damaged plants.

From: The use of click beetle pheromone traps to optimize the risk assessment of wireworm (Coleoptera: Elateridae) maize damage

Species and Monitoring year

Sample size

Positive group

AUC ± SE

95% CI

Cut-off

Sensitivity

Specificity

P

A. brevis Y0

275

5.07%

0.55 ± 0.09

0.49–0.61

>458

28.6%

98.8%

0.541

A. sordidus Y0

263

2.65%

0.60 ± 0.08

0.54–0.66

>445

85.71%

46.69%

0.23

A. brevis Y-1

248

5.24%

0.83 ± 0.07

0.77–0.87

>201

69.23%

98.3%

<0.001

A. sordidus Y-1

208

5.29%

0.74 ± 0.07

0.68–0.80

>1,110

54.55%

89.34%

<0.001

A. brevis Y-2

179

4.47%

0.70 ± 0.15

0.63–0.77

>458

62.5%

100%

0.168

A. sordidus Y-2

182

4.95%

0.67 ± 0.07

0.59–0.74

>409

88.89%

51.45%

0.019

  1. Positive group = percentage of sample size for which the damage was >15%; AUC = area under the ROC curve (accuracy); SE = standard error; 95% CI = 95% Confidence Interval for AUC; Cut-off = criterion on the number of adults to predict a damage >15%.
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