Table 2.

Observed and adjusted results for early PD experience, late PD use, HD-to-PD switches, and PD-to-HD switches

OutcomePre-PPS (2006–2010)Post-PPS (2011–2013)Post-PPS versus Pre-PPS OR (95% CI)P Value
Observed N (%)Adjusted % (95% CI)aObserved N (%)Adjusted % (95% CI)a
Full sampleN=387,115N=232,011
 Early PD experience36,496 (9.4)6.4 (6.3 to 6.5)29,174 (12.6)8.9 (8.8 to 9.1)1.51 (1.47 to 1.55)<0.001
 Late PD use46,888 (12.1)8.9 (8.8 to 9.0)37,252 (16.1)12.6 (12.4 to 12.7)1.47 (1.45 to 1.50)<0.001
Subgroup without early PD experiencen=350,619n=202,837
 Switch from HD to PDb12,330 (3.5)2.8 (2.8 to 2.9)9579 (4.7)4.1 (4.0 to 4.2)1.59 (1.52 to 1.66)<0.001
Subgroup with early PD experiencen=36,496n=29,174
 Switch from PD to HDc8909 (24.4)26.3 (25.7 to 26.9)6998 (23.9)25.0 (24.4 to 25.6)0.92 (0.87 to 0.98)0.004
  • PPS, Medicare prospective payment system for dialysis; OR, odds ratio; 95% CI, 95% confidence interval; PD, peritoneal dialysis; HD, hemodialysis.

  • a Estimated adjusted percentages and associated 95% CIs for all outcomes for the pre-PPS and post-PPS periods were estimated from models that included all covariates from Table 1. All adjusted estimates use the appropriate intercept and slope parameters, with fixed values of all covariates centered at means. Caution should be used when inferring these probabilities to population parameters.

  • b Fewer than 0.3% of these patients (n=631 pre-PPS, n=699 post-PPS) actually did try PD in the first 90 days but switched to HD before day 90 and then switched back to PD after day 90.

  • c One patient in the pre-PPS period actually initiated dialysis with HD, but switched to PD before day 90, and then switched back to HD after day 90.