Table 3.

Adenoid and tonsils

Statistic	N	Mean	SD	Min	Max
ms	191	0.69	0.19	0.12	0.98
Quality	191	0.00	0.59	−2.17	0.71
frac_female	191	0.51	0.03	0.42	0.60
frac_65	191	0.003	0.003	0.00	0.02
Com	191	1.04	0.30	0.53	2.18
HHI_ins	191	0.32	0.09	0.17	0.57
Lowvolume	191	0.25	0.43	0	1
Acad	191	0.07	0.26	0	1

This table shows summary statistics for each diagnosis group at the hospital-year level (2008–2011). We report the average, standard deviation, minimum and maximum of the variables that we included in our regression analysis. We also show the total number of observations for each diagnosis group