Understanding why apprentices consider dropping out: longitudinal prediction of apprentices’ workplace interest and anxiety

Empirical Research in Vocational Education and Training

Table 1 Cohort sample size, measurement timepoints and missingness

	Beginning	1st year		2nd year		3rd year
	T1^a	T2	T3	T4	T5	T6
Cohort 1 (n = 548)	M1	M2	M3	M4
Cohort 2 (n = 646)		M1	M2	M3	M4
Cohort 3 (n = 731)			M1	M2	M3	M4
Cohort 4 (n = 462)				M1	M2	M3
Responses	493	771	1212	1225	956	576
Unplanned missing	55	423	713	1162	883	617
Unplanned missing (%)	10%	35%	37%	49%	48%	52%
Planned missing	1839	1193	462	0	548	1194