Table 2.
Univariate analysis of CT-guided PRG grouped by modality with patient demographics, interventional parameters, and complications. Unless stated otherwise, data are the number of biopsies ± standard deviations. ×2 (R × 2), Fisher’s exact test, and Mann–Whitney-U-Test were used to calculate the statistical difference between groups of categorical, dichotomous, and continuous variables, respectively. Data are mean ± standard deviation. * statistically significant (defined by p < 0.05); y = year; mGy = milliGray; s = seconds; No = number; GT = gastropexy time; DLP = dose length product; C = center; MS-CT BM = multislice computed tomography biopsy mode; RT-CTF = real-time computed tomography fluoroscopy.
| Survey of PRG | |||||||
|---|---|---|---|---|---|---|---|
| Parameter | All (n = 100) | C1, MS-CT BM with Single Anchor (n = 50) | C2, RT-CTF with Gastropexy Device (n = 50) | p Value | |||
| Female | 27 | 27% | 14 | 28% | 13 | 26% | 1.000 |
| Age (y) | 62.52 | ±12.36 | 62.52 | ±12.36 | 64.18 | ±12.44 | 0.288 |
| Indication | 0.011 * | ||||||
| HN-cancer | 80 | 80% | 35 | 70% | 45 | 90% | |
| Neurological disorders | 14 | 14% | 12 | 24% | 2 | 4% | |
| Other indications | 6 | 6% | 3 | 6% | 3 | 6% | |
| DLP of CTF (mGy×cm) | 43.59 | ±53.10 | 56.28 | ±67.897 | 30.91 | ±27.539 | <0.001 * |
| Exposure Time (s) | 11.63 | ±12.86 | 5.88 | ±5.618 | 16.69 | ±15.183 | <0.001 * |
| Proportion of CTF DLP to total DLP | 0.13 | ±0.12 | 0.12 | ±0.134 | 0.14 | ±0.111 | 0.011 * |
| No. of CT | 2.31 | ±1.71 | 3.42 | ±1.797 | 1.20 | ±0.404 | <0.001 * |
| DLP of CTs (mGy×cm) | 390.43 | ±545.82 | 582.37 | ±714.3 | 198.50 | 128.54 | <0.001 * |
| Total DLP (mGy × cm) | 462.90 | ±582.92 | 681.00 | ±751.49 | 244.62 | ±156.74 | <0.001 * |
| GT (min) | 11.14 | ±5.725 | 11.50 | ±5.239 | 11.17 | ±6.015 | 0.463 |
| Procedure time (min) | 35.74 | ±21.27 | 41.08 | ±16.97 | 30.40 | ±23.83 | <0.001 * |
| Complications | 0.458 | ||||||
| Minor | 19 | 19% | 7 | 14% | 12 | 24% | |
| Major | 2 | 2% | 1 | 2% | 1 | 2% | |