Table 3.
Histological findings at post-diagnostic endoscopies according to time elapsed since the diagnostic endoscopy. If a patient had more than one endoscopy in one period, only the result of the latest endoscopy was included.
| Collagenous colitis | Lymphocytic colitis | Incomplete microscopic colitis | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 0–12 months (n = 63) |
13–24 months (n = 52) |
>24 months (n = 56) |
0–12 months (n = 33) |
13–24 months (n = 9) |
>24 months (n = 42) |
0–12 months (n = 49) |
13–24 months (n = 7) |
>24 months (n = 32) |
|
| Normal | 6 (2–15) | 4 (1–13) | 13 (5–24) | 9 (2–14) | – | 12 (4–26) | 4 (1–14) | 29 (4–71) | 25 (11–43) |
| Same MC group | 71 (59–82) | 73 (59–84) | 59 (45–72) | 55* (36–72) | 44 (14–79) | 43* (28–59) | 27 (15–41) | 14 (0–58) | 3 (0–16) |
| New CC | – | – | – | 3 (0–16) | 11 (0–48) | 17 (7–31) | 18 (9–32) | 14 (0–58) | 28 (14–47) |
| New LC | 2 (0–9) | – | 11 (4–22) | – | – | – | – | 14 (0–58) | 16 (5–33) |
| New MCi | 3 (1–11) | 2 (0–10) | 4 (1–12) | 6 (1–20) | – | 2 (0–13) | – | – | – |
| Lamina propria inflammation | 5 (1–13) | 2 (0–10) | 4 (1–12) | 6 (1–20) | 33 (7–70) | 2 (0–13) | 20 (27–56) | – | 6 (1–21) |
| Non-specific changes | 8 (3–18) | 8 (2–19) | 7 (2–17) | 15 (5–32) | 11 (0–34) | 24 (12–39) | 22 (12–37) | – | 16 (5–33) |
| Inflammatory bowel disease | 2 (0–9) | – | – | – | – | – | 2 (0–11) | – | – |
| Adenoma or polyp | 3 (1–11) | 8 (2–19) | 2 (0–10) | – | – | – | 4 (1–14) | – | 6 (1–21) |
| Dysplasia or cancer | – | – | – | 6 (1–20) | – | – | 2 (0–11) | 14 (0–58) | – |
| Ischaemia | – | – | 2 (0–10) | – | – | – | |||
| Diverticulosis | 14 (0–58) | ||||||||
Data are % (95% confidence interval).
CC, collagenous colitis; LC, lymphocytic colitis; MCi, incomplete microscopic colitis.
*One patient had both LC and CC.