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Table 4 Comparison of three matched cohorts on their pre-index date continuous match variables using paired t-tests.

From: Comparison of resource use by COPD patients on inhaled therapies with long-acting bronchodilators: a database study

Pre-Index Continuous Variables LABA or LAMATx LABA and LAMA Tx LABA, LAMA, and ICS Tx Significant Pairwise Paired t-tests*
  (n = 523) (n = 523) (n = 523)  
  LS Mean (SE) LS Mean (SE) LS Mean (SE)  
Age 70.0 (9.4) 70.7 (9.4) 70.4 (9.3) NONE
Rx comorbidity score 6.2 (2.6) 6.4 (2.8) 6.2 (2.6) NONE
% Days COPD medication exposure 64.3 (32.3) 66.3 (33.8) 63.2 (32.8) DvT
Average copay amount 12.9 (12.4) 13.9 (13.4) 14.0 (12.4) NONE
Total COPD-related costs 1,895.9 (1914.5) 1,987.7 (2411.5) 1,973.1 (2216.6) NONE
Number of hospital visits 0.2 (0.5) 0.2 (0.5) 0.2 (0.5) NONE
Number of days in hospital 0.8 (2.5) 0.8 (2.3) 0.6 (2.3) NONE
Number of emergency room visits 0.5 (1.1) 0.4 (1.0) 0.4 (0.8) NONE
Number of outpatient visits 21.7 (16.8) 22.4 (16.7) 20.9 (18.8) NONE
  1. *Pairwise paired t-tests for dependent measures were conducted and pairs resulting in a significant p-value are listed (M = LABA or LAMA, D = LABA and LAMA, T = LABA, LAMA, ICS, NONE = No sig dif). All variables were derived from the 12 month pre-period.