Table 2.
Intima-media-thickness measurements by ultrasound on segmental level.
| Segment | Total (N = 288) a | No GCA (N = 140) a | GCA (N = 148) a | p-value |
|---|---|---|---|---|
| CSTA | ||||
| N b | 212 | 107 | 105 | |
| Median (IQR) | 0.70 (0.55, 1.00) | 0.60 (0.50, 0.71) | 0.98 (0.70, 1.30) | <0.001 |
| Mean (sd) | 0.81 (0.36) | 0.61 (0.17) | 1.0 (0.39) | |
| TA frontal branch | ||||
| N b | 281 | 138 | 143 | |
| Median (IQR) | 0.60 (0.45, 0.93) | 0.48 (0.40, 0.58) | 0.91 (0.66, 1.10) | <0.001 |
| Mean (sd) | 0.72 (0.36) | 0.50 (0.15) | 0.93 (0.37) | |
| TA parietal branch | ||||
| N b | 272 | 130 | 142 | |
| Median (IQR) | 0.51 (0.40, 0.71) | 0.41 (0.35, 0.53) | 0.70 (0.49, 0.92) | <0.001 |
| Mean (sd) | 0.60 (0.31) | 0.44 (0.13) | 0.74 (0.35) | |
Values for the intima-media thickness are in millimeters, using the compressed lumen technique (combining both walls).
a
each patient can have two segments, i.e., the total N is twice the number of patients.
b
number of non-missing observations for this segment. CSTA, common superficial temporal artery; GCA, giant cell arteritis; IQR, interquartile range; sd, standard deviation; TA, temporal artery.