TABLE 3.
Lens dose rate Hp(3) and eye lens fluoroscopy time before and after radiation protection measures
| Physician | Before (After) a | Lg Y/N | Hp(3)rate [μSv/min] | ANOVA b (P value) | Fluoroscopy time [min] | P value c | |||
|---|---|---|---|---|---|---|---|---|---|
| Before‐measures | After‐measures | Before‐measures | After‐measures | ||||||
| Outside | Inside | Inside | |||||||
| Median [range] | Median [range] | Median [range] | Median [range] | Median [range] | |||||
| Cardiologist A | 9 (9) | Y | 12.0 [3.1–72.8] | 5.2 [1.4–32.5] | 2.6 [0.6–11.5] | 15.3 [4.5–25.4] | 17.7 [8.6–34.4] | ||
| Cardiologist B | 5 (2) | N | 7.6 [2.0 –23.1] | 3.9 [0.7–23.7] | 2.8 [0.7–4.9] | 23.2 [13.6–36.6] | 29.4 [22.1–36.6] | ||
| Cardiologist C | 2 (5) | Y | 23.5 [13.7–33.3] | 13.4 [6.4–20.4] | 1.5 [0.8–37.9] | 15.5 [12.5–18.5] | 28.8 [7.3–44.1] | ||
| Circulatory Internal Medicine | 16 (16) | 12.0 * [2.0–72.8]† | 5.0 * [0.7–32.5] | 2.6 * [0.6–38.0]† | .011 | 17.2 [4.5–36.6] | 23.2 [7.3–44.1] | .363 | |
| Neurosurgeon D | 5 (5) | Y | 7.8 [1.3–16.7] | 3.6 [1.4–7.1] | 0.8 [0.5–2.2] | 35.0 [20.3–84.4] | 39.8 [26.9–79.3] | ||
| Neurosurgeon E | 5 (5) | Y | 5.0 [4.0–11.6] | 2.1 [1.5–5.3] | 0.5 [0.4–1.0] | 10.3 [9.2–32.9] | 20.4 [10.9–21.9] | ||
| Cerebrovascular Medicine | 10 (10) | 5.0 * [1.3–16.7]‡ | 2.5 * [1.4–7.1]§ | 0.7 * [0.4–2.2]‡§ | <.01 | 25.9 [9.2–84.4] | 24.4 [10.9–79.3] | .705 | |
| Gastroenterologist F | 5 (5) | Y | 6.6 [4.2–14.6] | 3.7 [2.2–7.7] | 1.4 [0.6–4.9] | 13.8 [10.1–63.9] | 15.1 [6.9–28.8] | ||
| Gastroenterologist G | 4 (4) | N | 1.1 [0.6–3.2] | — | 0.6 [0.33–1.5] | 22.7 [9.5–56.0] | 22.7 [9.5–56.0] | ||
| Gastroenterologist H | 3 (3) | Y | 0.4 [0.0–0.9] | 0.2 [0.2–0.4] | 0.0 [0.0–1.3] | 2.5 [1.4–2.6] | 2.0 [1.8–2.5] | ||
| Gastroenterologist I | 5 (5) | N | 8.3 [3.65–12.3] | — | 5.1 [2.0–9.1] | 3.0 [2.0–33.0] | 3.0 [2.0–33.0] | ||
| Gastroenterologist J | 5 (5) | N | 2.2[0.6–3.2] | — | 1.2 [0.1–2.3] | 5.3 [1.9–10.8] | 5.3 [1.9–10.8] | ||
| Gastroenterological Medicine | 22 (22) | 2.7 [0.0–15.0] | 2.5 [0.2–8.0] | 1.3 [0.0–4.9] | .073 | 9.3 [1.4–63.9] | 8.8 [1.8–56.0] | .743 | |
| Orthopedic Surgeon K | 10 (7) | Y | 9.0 [0.0–41.9] | 8.0 [0.0–19.8] | 3.1 [0.0–13.7] | 1.1 [0.4–3.2] | 0.6 [0.3–3.1] | ||
| Orthopedic Surgeon L | 5 (5) | N | 2.9 [0.6–4.9] | — | 1.1 [0.6–1.7] | 6.6 [2.4–7.3] | 6.6 [2.4–7.3] | ||
| Orthopedic Surgery | 15 (12) | 6.4 [0.0–41.9] | 8.0 [0.0–19.8] | 2.5 [0.0–13.7] | .194 | 2.0 [0.4–7.3] | 1.6 [0.3–7.3] | .807 | |
| Radiologist N | 6 (6) | Y | 1.9 [0.4–4.0] | 1.8 [0.5–1.4] | 0.7 [0.0–4.0] | 48.8 [8.2–114.8] | 40.6 [10.5–80.8] | ||
| Radiologist O | 6 (4) | Y | 1.4 [0.2–5.6] | 0.7 [0.0–2.8] | 0.3 [0.0–1.0] | 12.6 [1.8–30.8] | 17.3 [0.3–43.0] | ||
| Radiological Medicine | 12 (10) | 1.9 [0.2–5.6] | 0.8 [0.0–2.8] | 0.4 [0.0–4.0] | .219 | 21.5 [1.8–114.8] | 36.4 [0.3–80.8] | .997 | |
The significant difference (P < .05.) is set in boldface.
Lg = lead glasses; Y/N = wear glasses/do not wear glasses; Hp(3)rate = lens dose of the eye per unit time (3‐mm dose equivalent).
Number of Before‐measures (After‐measures) procedures.
Differences in Hp(3)rate before and after the radiation protection measures were confirmed using the Kruskal–Wallis one‐way analysis of variance. When the one‐way analysis of variance result was significant, the difference between the individual before and after radiation protection measures was evaluated using the Dunn test (with Bonferroni correction).
Differences in fluoroscopy time before and after the radiation protection measures were confirmed using the Mann–Whitney U test. The same symbols indicate that Bonferroni‐corrected Dunn test multiple comparisons showed significant differences. All analyses were performed using the Statistical Package for the Social Science (version 25.0, IBM Corporation).
P < .05.