Table 3.
Comparison of the suprapatellar recess size as measured by ultrasound in patients with and without clinical arthritis
| Suprapatellar Recess size Mean ± SD Median (Min-Max) | |||||
|---|---|---|---|---|---|
| Knees with clinical arthritis | Knees without clinical arthritis | P Value | |||
|
1–3 years Boys (n = 0) Girls (n = 11) |
n/a 9.9 (6.7–10.7) 3.9–12.0 |
1–3 years Boys (n = 0) Girls (n = 3) |
n/a 1.3 (0.7-§) 0.7–1.5 |
< 0.001 | |
|
4–6 years Boys (n = 4) Girls (n = 14) |
5.8 (2.5–7.1) 1.5–7.6 7.9 (4.6–9.3) 3.6–10.2 |
4–6 years Boys (n = 1) Girls (n = 7) |
-§ 1.0 (0.7–1.4) 0.1–2.2 |
0.004 | |
|
7–9 years Boys (n = 10) Girls (n = 12) |
6.2 (3.5–10.2) 2.1–12.0 9.3 (8.6–11.5) 7.0-13.4 |
7–9 years Boys (n = 5) Girls (n = 2) |
1.3 (1.0-1.5) 1.0-1.8 1.0 (0.9-§) 0.9–1.2 |
< 0.001 | |
|
10–12 years Boys (n = 7) Girls (n = 28) |
7.6 (4.9–23.6) 4.3–69.0 7.8 (5.7–9.5) 1.9–13.9 |
10–12 years Boys (n = 3) Girls (n = 20) |
1.9 (1.2-§) 1.2–4.3 1.5 (1.0-1.9) 0.6–2.6 |
< 0.001 | |
|
13–15 years Boys (n = 12) Girls (n = 21) |
11.2 (9.2–16) 4.0-18.3 7.2 (5.6–8.9) 3.6–13.1 |
13–15 years Boys (n = 5) Girls (n = 10) |
1.2 (0.5–2.4) 0-3.4 1.7 (1.1–2.5) 0-3.4 |
< 0.001 | |
|
16–18 years Boys (n = 8) Girls (n = 10) |
9.7 (7.3–10.7) 5.6–16.8 6.6 (4.7–11.6) 3.7–17.5 |
16–18 years Boys (n = 6) Girls (n = 4) |
0.8 (0-1.6) 0-1.8 1.1 (0.8–1.3) 0.7–1.4 |
< 0.001 | |
min-max minimum-maximum, SD standard deviation
§incalculable