Fig. 6From: Measurement of the nociceptive flexion reflex threshold in critically ill patients – a randomized observational pilot studyNFRT at different RASS values. The statistical differences in the median NFRT with respect to the respective RASS value were calculated using Mann-Whitney rank sum tests or Welch´s t-tests. The statistical results are shown in detail in Table 3 in the Additional file 1. RASS = Richmond Agitation Sedation Scale, NFR = nociceptive flexion reflex, IQR = interquartile rangeBack to article page