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. 2016 Nov 10;12(1):190–199. doi: 10.2215/CJN.03930416

Table 5.

Facility median (PTH, ferritin) and mean (dialysis treatment time) values in the US DOPPS sample at three time points (2010, 2012, and 2015)

Variable US DOPPS Facility Percentiles
N 10th 25th 50th 75th 90th
Median PTH in facility, pg/ml
 August 2010 90 245 272 317 381 448
 December 2012 189 285 317 390 451 547
 April 2015 144 290 381 451 532 629
Median ferritin in facility, ng/ml
 August 2010 90 418 527 638 727 928
 December 2012 189 528 654 765 905 1081
 April 2015 144 469 621 756 952 1143
Mean treatment time in facility, min
 August 2010 90 194 205 215 227 234
 December 2012 194 198 206 217 227 237
 April 2015 146 204 212 219 227 234

PTH, parathyroid hormone; DOPPS, Dialysis Outcomes and Practice Patterns Study. Results modified from reference 27, with permission.