Table 1.
Reference values of normal FH coverage by different acetabular regions in boys and girls aged 1–6 y.o.
| FHC | Male | Mean (±std. dev.) Minimum/maximum |
Female | Mean | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| (±std. dev.) | ||||||||||
| Minimum/maximum | ||||||||||
| y.o. | AC | S-AC | S-PC | P-SC | P-IC | AC | S-AC | S-PC | P-SC | P-IC |
| 1 | 19.44 (±15.7) 0/38 |
89.05 (±3.76) 81/100 |
86.29 (±3.38) 77/94 |
50.14 (±5.12) 44/62 |
50.2 (±5.06) 39/60 |
14.54 (±17.6) 0/41 |
88.9 (±5.0) 79/97 |
84.72 (±5.43) 73/92 |
49.04 (±6.79) 34/58 |
51.31 (±5.99) 42/64 |
| 2 | 28.57 (±9.98) 5/41 |
92.35 (±6.74) 83/103 |
90.78 (±5.28) 84/99 |
53.92 (±3.56) 47/60 |
53.42 (±5.41) 43/60 |
33.93 (±4.5) 25/41 |
100.87 (±30.09) 78/211 |
91.06 (±6.14) 76/98 |
56.93 (±5.3) 50/66 |
57.87 (±5.94) 50/67 |
| 3 | 36.1 (±4.48) 27/43 |
98.2 (±4.2) 90/107 |
96.45 (±3.45) 89/103 |
63.1 (±2.8) 57/68 |
60.85 (±4.03) 53/68 |
30.72 (±15.28) 0/47 |
94.22 (±5.48) 84/104 |
92.5 (±7) 70/100 |
61.16 (±6.47) 49/72 |
63.22 (±6.3) 52/71 |
| 4 | 35.07 (±8.97) 11/44 |
96.15 (±4.28) 89/105 |
95.57 (±3.94) 88/103 |
61.92 (±3.59) 57/71 |
62.03 (±3.9) 55/68 |
34.54 (±11.28) 8/48 |
95.68 (±4.86) 87/106 |
94.63 (±5.42) 83/102 |
61.45 (±7.31) 42/71 |
63.45 (±7.23) 47/71 |
| 5 | 41.61 (±4.56) 35/50 |
100.15 (±5.37) 90/109 |
99.53 (±3.92) 91/106 |
66.19 (±3.8) 58/73 |
64.11 (±4.06) 59/75 |
41.24 (±9.83) 28/57 |
99.35 (±4.41) 92/104 |
100.85 (±3.69) 94/106 |
69.64 (±7.84) 59/85 |
66.5 (±5.53) 59/78 |
| 6 | 41.72 (±4.8) 30/51 |
100.63 (±4.12) 92/107 |
100.44 (±4.39) 92/110 |
68.86 (±5.57) 55/79 |
66.77 (±5.13) 56/76 |
43.18 (±6.93) 30/54 |
99.54 (±4.87) 91/108 |
101.04 (±4.69) 92/110 |
71.77 (±5.25) 61/84 |
69.9 (±3.57) 63/79 |
FHC: femoral head coverage; y.o.: years old; AC: anterior coverage; S-AC: superior-anterior coverage; S-PC: superior-posterior coverage; P-SC: posterior-superior coverage; P-IC: posterior-inferior coverage; std. dev: standard deviation.