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. 2014 Sep 10;13:64. doi: 10.1186/s12939-014-0064-8

Table 2.

Results of stepwise selection

Full model Parsimonious model
β S.E. p-value β S.E. p-value
Accreditation status (ref = medical center) 0.1279 0.0495 0.0098 0.1378 0.0461 0.0028
Ownership (ref = public) 0.0236 0.0506 0.6409
Surgeon’s gender (ref = male) 0.0376 0.1247 0.7630
Surgeon’s age –0.0474 0.00686 <.0001 –0.0474 0.00688 <.0001
Patient’s age 0.0531 0.00482 <.0001 0.0529 0.00481 <.0001
Patient’s gender (ref = male) 0.1220 0.0484 0.0117
CCI (ref = 2+) 0.3561 0.0475 <.0001 0.3549 0.0473 <.0001
Number of vessels obstructed (ref = 2+) –0.2322 0.0463 <.0001 –0.2319 0.0463 <.0001