Table 1.

Descriptive Statistics by Subperiod and Type of Report for the Full Sample

	BMI screened annually (2004–2007)			BMI screened biennially (2008–2015)			Full study period (2004–2015)
	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
	Normal	Overweight	Obese	Normal	Overweight	Obese	Normal	Overweight	Obese
BMI z-score	0.09	1.33	2.12	0.07	1.33	2.12	0.08	1.33	2.12
	(0.63)	(0.18)	(0.32)	(0.64)	(0.17)	(0.32)	(0.63)	(0.17)	(0.32)
BMI percentile	53.77	90.49	97.89	53.17	90.49	97.87	53.50	90.49	97.88
	(21.87)	(2.89)	(1.34)	(22.18)	(2.89)	(1.34)	(22.01)	(2.89)	(1.34)
Male (%)	50.53	50.38	54.88	50.08	49.50	54.29	50.33	49.99	54.62
	(50.00)	(50.00)	(49.76)	(50.00)	(50.00)	(49.82)	(50.00)	(50.00)	(49.79)
Female (%)	49.47	49.62	45.11	49.92	50.50	45.71	49.67	50.01	45.38
	(50.00)	(50.00)	(49.76)	(50.00)	(50.50)	(49.82)	(50.00)	(50.00)	(49.79)
Younger cohorts (%)	58.37	55.82	55.20	51.71	47.72	46.20	55.41	52.54	51.23
	(49.29)	(49.66)	(49.73)	(49.97)	(49.95)	(49.86)	(49.71)	(49.95)	(49.99)
Older cohorts (%)	41.63	44.18	44.80	48.29	52.28	53.80	44.59	47.76	48.77
	(49.29)	(49.66)	(49.73)	(49.97)	(49.95)	(49.86)	(49.71)	(49.95)	(49.99)
Nonminority (%)	70.71	66.81	63.31	68.51	63.65	58.66	69.73	65.42	61.26
	(45.51)	(47.09)	(48.20)	(46.45)	(48.10)	(49.24)	(45.94)	(47.56)	(48.72)
Minority (%)	29.29	33.19	36.69	31.49	36.35	41.34	30.27	34.58	38.74
	(45.51)	(47.09)	(48.20)	(46.45)	(48.10)	(49.24)	(45.94)	(47.56)	(48.72)
Free meals (%)	41.25	43.97	47.84	43.36	47.55	52.92	42.19	45.55	50.08
	(49.23)	(49.64)	(49.95)	(49.56)	(49.94)	(49.91)	(49.39)	(49.80)	(50.00)
Nonfree meals (%)	58.75	56.03	52.16	56.64	52.45	47.08	57.81	54.45	49.92
	(49.23)	(49.64)	(49.95)	(49.56)	(49.94)	(49.91)	(49.39)	(49.80)	(50.00)
N	531,732	156,301	190,149	425,282	123,970	150,277	957,014	280,271	340,426

Note: Standard deviations are in parentheses.