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Table 5 Studies comprising quantitative results on spectral Dopplera

From: The use of ultrasonography in the diagnosis of nail disease among patients with psoriasis and psoriatic arthritis: a systematic review

Studies Population Spectral Doppler Results
Marina et al. (2016) [31] PsO NVRI
Median (IQR):
0.62 (0.55–0.69)
Patients with PsO presented with significantly higher median NVRI measurements than controls (p < 0.0001)
Controls NVRI
Median (IQR):
0.57 (0.55–0.58)
Mendonça et al. (2014) [34] PsA LRI
Mean (SD): 0.50 (0.13)
Mean (SD): 0.48 (0.09)
RI measurements in both the transverse and longitudinal planes were lower for patients with PsA than controls.
Controls LRI
Mean (SD): 0.86 (0.41)
Mean (SD): 0.70 (0.16)
El-Ahmed et al. (2011) [40] PsO NVRI
Mean (SD): 0.56 (0.09)
The mean NVRI was significantly higher in PsO than controls (p < 0.001). Patients with PsO with clinical nail disease had also significantly higher NVRI than those without nail disease (p < 0.05).
Patients with PsO with nail disease NVRI
Mean (SD): 0.58 (0.10)
Patients with PsO without nail disease NVRI
Mean (SD): 0.52 (0.45)
Controls NVRI
Mean (SD): 0.42 (0.04)
  1. IQR interquartile range, LRI Resistance Index in longitudinal plane, NGS standard trilaminar appearance of the nail bed, NVRI Nailfold Vessel Resistive Index, PD power Doppler, PsA psoriatic arthritis, PsO psoriasis, RI Resistive Index, SD standard deviation, TRI Resistive Index in transverse plane
  2. aOnly studies with quantitative results regarding nail thickness, trilaminar appearance, presence of PD signal, and nail RI were included in this table