Table 2.

Summary statistics of initial questionnaire measures for starters.

		Non-completer n = 2213 M (SD)	Completer n = 435 M (SD)	Total n = 2648 M (SD)
Female (%) a		82.1	90.1	83.4
Age (years) a		44.5 (11.9)	47.4 (11.9)	45.0 (11.9)
BMI		34.0 (6.6)	33.6 (6.4)	34.0 (6.5)
	25-29 (%)	30.9	32.4	31.2
	30-40 (%)	52.7	53.1	52.8
	>40 (%)	16.4	14.5	16.0
PBC b (1 min; 7 max) c		6.32 (0.63)	6.33 (0.62)	6.32 (0.63)
Intention d (1 min; 7 max)		6.75 (0.53)	6.80 (0.47)	6.76 (0.52)
PCS a,e (1 min; 4 max)		3.06 (0.45)	3.01 (0.44)	3.05 (0.45)
WLSE f (1 min; 4 max)		2.22 (0.64)	2.24 (0.64)	2.22 (0.64)
Internet use (%)
	<1 to 4 hr	10.8	9.0	10.4
	5 to 10 hr	34.8	33.8	34.6
	11 to 20 hr	24.3	25.3	24.4
	>20 hr	30.2	32.0	30.5

^a P < .001.

^b PBC: Perceived behavioral control over staying on diet.

^c P < .05.

^d Intention: Behavioral intention to stay on diet.

^e PCS: Proactive coping scale score.

^f WLSE: Weight loss self-efficacy score.