Table 1. Overview of respondents' background characteristics: gender distribution and average age in Year 1 and Year 5.

	Male	Female	Male/Female	Total	Mean Age (SD)
Year 1	50	103	33%/67%	153	18.9 (3.2)
Year 5	54	66	45%/55%	120	25.1 (3.8)
Total	104	169	38%/62%	273