Table 2 Age-specific reference values for alkaline phosphatase
Percentiles | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alkaline phosphatase of boys (U/L) | Alkaline phosphatase of girls (U/L) | |||||||||||||
Age (years) | 2.5th | 10th | 25th | 50th | 75th | 90th | 97.5th | 2.5th | 10th | 25th | 50th | 75th | 90th | 97.5th |
> = 1 | 158.12a | 183.98 | 211.87 | 249.58 | 295.47 | 344.57 | 410.22 | 147.65 | 170.83 | 194.89 | 226.17 | 260.05 | 290.23 | 323.58 |
2~ | 154.04 | 176.04 | 199.47 | 230.77 | 267.96 | 306.45 | 356.10 | 150.59 | 172.39 | 196.48 | 230.20 | 270.07 | 308.80 | 355.40 |
3~ | 149.78 | 169.74 | 190.93 | 219.21 | 252.45 | 286.19 | 328.80 | 149.71 | 169.01 | 190.69 | 221.77 | 259.78 | 298.16 | 346.36 |
4~ | 145.69 | 164.91 | 185.44 | 213.02 | 245.43 | 277.99 | 318.70 | 149.40 | 166.49 | 185.77 | 213.65 | 248.26 | 283.90 | 329.80 |
5~ | 146.41 | 165.46 | 185.90 | 213.56 | 246.01 | 278.29 | 318.22 | 159.86 | 176.36 | 195.03 | 222.15 | 256.15 | 291.68 | 338.35 |
6~ | 154.68 | 174.62 | 196.14 | 225.44 | 259.80 | 293.67 | 335.16 | 165.39 | 182.25 | 201.18 | 228.42 | 262.13 | 296.88 | 341.79 |
7~ | 149.28 | 169.46 | 191.51 | 221.98 | 258.00 | 293.50 | 336.94 | 156.96 | 175.67 | 196.59 | 226.41 | 262.79 | 299.55 | 345.84 |
8~ | 151.66 | 173.21 | 197.06 | 230.53 | 270.47 | 309.86 | 358.01 | 152.36 | 174.93 | 199.89 | 234.82 | 276.26 | 316.78 | 365.84 |
9~ | 156.19 | 178.24 | 202.77 | 237.41 | 278.74 | 319.15 | 368.11 | 153.30 | 180.38 | 209.44 | 248.57 | 292.80 | 333.93 | 381.25 |
10~ | 159.57 | 182.49 | 208.21 | 244.90 | 288.83 | 331.60 | 383.14 | 163.50 | 194.82 | 227.33 | 269.50 | 315.23 | 356.14 | 401.53 |
11~ | 163.55 | 188.80 | 217.60 | 259.44 | 310.24 | 359.94 | 420.05 | 163.59 | 197.41 | 232.63 | 278.44 | 328.23 | 372.88 | 422.47 |
12~ | 177.13 | 206.76 | 241.16 | 292.20 | 355.15 | 417.23 | 492.69 | 128.62 | 160.81 | 196.43 | 245.75 | 303.01 | 357.46 | 421.22 |
13~ | 183.35 | 217.16 | 257.27 | 318.29 | 395.16 | 471.87 | 566.02 | 93.35 | 117.65 | 146.58 | 190.35 | 246.77 | 306.19 | 383.20 |
14~ | 149.89 | 181.66 | 220.51 | 281.75 | 361.49 | 442.93 | 544.83 | 74.21 | 90.45 | 110.36 | 141.94 | 185.71 | 236.02 | 308.37 |
15~ | 100.65 | 124.89 | 155.45 | 205.40 | 272.68 | 343.05 | 432.82 | 63.30 | 74.12 | 87.20 | 107.79 | 136.42 | 169.87 | 219.54 |
16~ | 71.07 | 87.33 | 107.74 | 140.90 | 184.96 | 230.14 | 286.59 | 55.64 | 63.43 | 72.59 | 86.56 | 105.25 | 126.27 | 156.26 |
17~ | 62.80 | 73.95 | 87.40 | 108.24 | 134.33 | 159.48 | 189.13 | 50.72 | 57.23 | 64.69 | 75.68 | 89.73 | 104.74 | 124.89 |
18~ | 59.95 | 68.26 | 77.98 | 92.52 | 109.90 | 125.85 | 143.82 | 47.53 | 53.67 | 60.54 | 70.35 | 82.37 | 94.60 | 110.11 |
19~ | 56.06 | 62.90 | 70.82 | 82.53 | 96.23 | 108.52 | 122.04 | 45.38 | 51.64 | 58.49 | 67.96 | 79.08 | 89.88 | 102.90 |