Table 2.

Key performance indicators by lessons completed.

Performance indicator	Independent samples		Paired samples: 2 or more lessons completed
	1 lesson completed	2 or more lessons completed
Unique users, n	158,835	122,010	24,890
Lessons completed, n	158,835	372,253	81,113
LLVa, %	55.71c	57.51	58.02
Link views per LLV, n	1.89c	2.15	2.17
Link view minutes per LLV, n	2.46	0.83c	1.51
ESOCb, n	54,098	111,900	25,795
ESOC with stage progression, %	85.20	82.86c	84.69

^aLLV: lessons completed that had at least one link view.

^bLessons beginning in an early stage of change (ESOC).

^cP<.001.