Table 3.

Stochastic Frontier Analysis Inefficiency Scores

Hospital Category	Mean Inefficiency Score	Number of Observations	Comparison of Means	Difference* (t-Value)
ALL hospitals	0.280	1,018	—	—
FULL service	0.274	975	—	—
SSH	0.425	43	FULL versus SSH	0.151**
				(2.83)
ORTH/SURG	0.471	33	FULL versus ORTH/SURG	0.197**
				(3.12)
CARDIAC	0.277	10	FULL versus CARDIAC	0.003
				(0.04)

^*The difference in the means is calculated as the full-service hospital group mean subtracted from the SSH mean. Significance of the difference is determined using the two sample t-test.

^**p<0.01.

SSH, surgical service; ORTH, orthopedic; SURG, surgical.