TABLE 3—

Pre- and Postintervention Mean Differences in Knowledge and Behavioral Variables of Experimental (Physical Activity and Teenage Health [PATH]) and Control (Physical Education [PED]) Female High-School Participants: New York City, 1994–1996

	PATH, Mean (SD)			PED, Mean (SD)
	Pre	Post	Post − Pre Δ1	Pre	Post	Post − Pre Δ2	Mean Difference (Δ1 − Δ2)	SE Mean Difference
HHK, % correct*	51.6 (15.9)	56.1 (19.6)	4.5 (12.7) (n = 281)	54.4 (19.1)	51.2 (23.0)	−3.2 (15.9) (n = 94)	7.7	2.2
SPH, 1–9	6.2 (1.5)	6.4 (1.5)	0.2 (1.5) (n = 262)	5.8 (1.5)	5.9 (1.6)	0.1 (1.7) (n = 95)	0.1	0.2
PA, no. sessions per week	4.5 (2.8)	5.3 (2.9)	0.8 (2.6) (n = 273)	4.9 (3.2)	5.5 (3.7)	0.6 (3.2) (n = 118)	0.2	0.3
DH, no. foods per week	45.8 (21.6)	41.7 (21.2)	−4.1 (17.4) (n = 286)	43.8 (20.7)	42.6 (19.5)	−1.2 (16.2) (n = 114)	2.9	1.9

Note. HHK = heart health knowledge; SPH = self-perception of health (9 = good); PA = physical activity = number of non–school-related activities of 15 minutes per session per week or greater in duration; DH = dietary habits.

*P < .001.