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Table 2 Baseline Demographic Characteristics Between CDI and Non-CDI Residents Before and After PSM

From: Burden of Clostridium difficile-associated disease among patients residing in nursing homes: a population-based cohort study

  Unmatched Groups 1:4 PSM-Matched Groups
Non-CDI Residents CDI Residents Non-CDI Residents CDI Residents
(N = 30258) (N = 789) (N = 2612) (N = 653)
N/Mean % N/Mean % P-value Std. Diff. N/Mean % N/Mean % P-value Std. Diff.
Age (mean ± SD) 83.6 ± 9.3   83.1 ± 8.8   0.1103 5.6 83.5 ± 9.1   83.6 ± 8.7   0.9206 0.4
 65–74 5979 19.8% 156 19.8% 0.9934 0.0 501 19.2% 116 17.8% 0.4082 3.6
 75–84 8541 28.2% 237 30.0% 0.2648 4.0 770 29.5% 200 30.6% 0.5657 2.5
 85 or older 15738 52.0% 396 50.2% 0.3117 3.6 1341 51.3% 337 51.6% 0.9025 0.5
Gender
 Female 23020 76.1% 585 74.1% 0.2089 4.5 1946 74.5% 498 76.3% 0.3535 4.1
Region
 Northeast 8610 28.5% 285 36.1% <0.001 16.4 895 34.3% 230 35.2% 0.6453 2.0
 Midwest 10375 34.3% 219 27.8% 0.0001 14.2 739 28.3% 185 28.3% 0.9845 0.1
 South 10239 33.8% 261 33.1% 0.6563 1.6 905 34.6% 224 34.3% 0.8685 0.7
 West 1033 3.4% 23 2.9% 0.4453 2.8 73 2.8% 14 2.1% 0.3557 4.2
Race/Ethnicity
 White 24337 80.4% 612 77.6% 0.0455 7.0 2065 79.1% 527 80.7% 0.3523 4.1
 Black 4198 13.9% 128 16.2%% 0.06 6.6 392 15.0% 92 14.1%% 0.5545 2.6
 Other 1723 5.7% 49 6.2% 0.5373 2.2 155 5.9% 34 5.2% 0.4765 3.2
Insurance Type
 Medicare only 5812 19.2% 151 19.1% 0.9607 0.2 460 17.6% 129 19.8% 0.2025 5.5
 Medicaid only 5221 17.3% 112 14.2% 0.0245 8.4 366 14.0% 84 12.9% 0.4463 3.4
 Medicare and Medicaid dual 19225 63.5% 526 66.7% 0.0712 6.6 1786 68.4% 440 67.4% 0.6252 2.1
  1. CDI Clostridium difficile infection, SD standard deviation; Std. Diff standardized difference, PSM propensity score matching