Table 4. Purging: Wave 1 None vs. Others Contrast.

	Purging Trajectory Groups Means (SD) or Percentages			t-test or chi square
Risk Variable	None	Dabble	Increasing	t or χ2
NU-1	2.15 (0.66)	2.42 (0.67)	2.37 (0.79)	t = -3.53*
NA-1	2.04 (0.71)	2.41 (0.84)	2.11 (0.76)	t = -3.23*
EE-1	2.18 (1.28)	2.43 (1.48)	2.43 (1.42)	t = -2.06*
TE-1	3.00 (1.59)	3.27 (1.70)	3.44 (1.63)	t = -2.31*
Pubertal Onset	22.5%	28.1%	29.5%	χ2 =2.98

Note. NU, negative urgency; NA, negative affect; EE, eating expectancies; TE, thinness expectancies; each number following the variable represents the wave in which the data was collected (i.e., NU-1 = Negative Urgency, wave 1); all t contrasts had df = 936, χ² df = 1;

^*p< .05. For pubertal onset, the percentage positive at wave 1 in each group is reported. All contrasts are t-tests with the exception of those with pubertal onset, which are chi square tests of independence.