Parameters included in Pettersson score [18]
| RADIOGRAPHIC PARAMETER | FINDING(S) | SCORE |
|---|---|---|
| Osteoporosis | Absent | 0 |
| Present | 1 | |
| Enlarged epiphysis | Absent | 0 |
| Present | 1 | |
| Irregular subchondral surface | Absent | 0 |
| Slight | 1 | |
| Pronounced | 2 | |
| Narrowing of joint space | Absent | 0 |
| < 50% | 1 | |
| > 50% | 2 | |
| Subchondral cyst formation | Absent | 0 |
| One cyst | 1 | |
| More than one cyst | 2 | |
| Erosions at joint margins | Absent | 0 |
| Present | 1 | |
| Gross incongruence of articulating bone ends (angulation/displacement) | Absent | 0 |
| Slight | 1 | |
| Pronounced | 2 | |
| Joint deformity | Absent | 0 |
| Slight | 1 | |
| Pronounced | 2 | |
Distribution of joint health scoring and biochemical parameters in different age groups
| AGE GROUPS | 1 TO 5 YEARS (N=21) | >5 TO 10 YEARS (N=67) | >10 TO 15 YEARS (N=66) | > 15 YEARS (N=166) |
|---|---|---|---|---|
| No. of joints affected (mean ± SD) | 3.81±1.47 | 4.88±2.25 | 5.22±2.29 | 5.56±2.37 |
| HJHS (mean ± SD) | 13.71±2.81 | 14.29±2.39 | 14.60±2.24 | 14.26±2.37 |
| Peterson score (mean ± SD) | 10.14±1.45 | 9.76±1.98 | 10.12±1.6316 | 10.13±1.81 |
| Calcium (mean ± SD) | 9.91±0.50 | 9.66±0.62 | 9.77±0.60 | 9.53±0.58 |
| Low serum calcium (age/sex adjusted) | 0% (0/21) | 8.9% (6/67) | 6.06% (4/66) | 21.08% (35/166) |
| Phosphorus (mean ± SD) | 4.42±0.73 | 4.57±0.65 | 3.95±0.80 | 3.56±0.61 |
| Low serum phosphorus (age/sex adjusted) | 28.57% (6/21) | 17.91% (12/67) | 13.63% (9/66) | 9.03% (15/166) |
| Vitamin D3 (ng/dl);(mean ± SD) | 12.88±5.24 | 14.84±7.21 | 16.35±9.31 | 17.04±7.57 |
| Low vitamin D3 (<20 ng/dl); (% (n)) | 90 % (18/21) | 82.09% (55/67) | 71.2% (47/66) | 71.69%(119/166) |
| b-ALP (ug/L); (mean ± SD) | 116.67±11.2 | 149.62±23.09 | 197.95±29.02 | 42.07±29.691 |
| High b-ALP (age/sex adjusted); (% (n)) | 76.19 % (16/21) | 86.57 % (58/67) | 80.33% (53/66) | 94.57 % (157/166) |
| ALP (U/L); (mean ± SD) | 119.42±18.92 | 103.79±20.73 | 117.09±24.61 | 104.75±23.72 |