TABLE 2.

Student Participation in NSLP Meals Before and After Removal of À La Carte Offerings at 3 Public Schools, San Francisco, CA, 2009–2010

	Preintervention			Postintervention
	Student Enrollment, No.	Students Purchasing À La Carte, %	Students Participating in NSLP, %	Student Enrollment, No.	Students Participating in NSLP, %	Change in NSLP Participation, %
Balboa High Schoola
Free	452	…	31	512	54	73
Reduced	194	…	19	231	48	154
Not qualified	379	…	6	570	5	−9
Total	1025	6.9	19	1313	32	63
Francisco Middle Schoolb
Free	533	…	60	533	68	13
Reduced	91	…	53	91	65	23
Not qualified	76	…	30	76	22	−26
Total	700	10.0	56	700	62	12
Lowell High Schoolc
Free	514	…	52	514	73	41
Reduced	419	…	53	419	72	38
Not qualified	1646	…	3	1646	11	230
Total	2579	6.5	21	2579	33	58

Note. NSLP = National School Lunch Program. The elimination of à la carte services occurred on 3 different dates at the 3 schools: March 31, 2009, at Balboa High School; January 14, 2010, at Francisco Middle School; and April 12, 2010, at Lowell High School. The ellipses indicate that data were not available to disaggregate competitive food purchases by student NSLP status (e.g., students who qualified for free or reduced-price lunches).

^aThe evaluation of participation at Balboa High School spanned 2 different school years: preintervention average participation reflects data from January 2009 to March 2009, and postintervention data are from August 2009 to May 2010.

^bAt Francisco Middle School, preintervention average participation reflects data from August 2009 to January 2010, and postintervention data are from January 2010 to May 2010.

^cAt Lowell High School, preintervention average participation reflects data from August 2009 to April 2010, and postintervention data are from April 2010 to May 2010.