Table 1.

Age of participants in years (mean, standard deviation, age range), number of participants, and gender distribution

	Cohort 1	Cohort 2	Cohort 3	Cohort 4	Cohort 5	Cohort 6	n
Wave 1	8.58 (0.27)	12.41 (0.37)	16.53 (0.44)	20.50 (0.57)
Range	8.05–9.13	11.87–13.22	15.84–17.58	19.32–21.48
n	27	31	28	28			114
Females	13	17	13	15
Wave 2	12.90 (0.52)	16.58 (0.42)	20.70 (0.51)	24.93 (0.73)	41.39 (2.86)	65.38 (2.73)
Range	11.82–13.73	15.92–17.41	19.73–21.75	23.09–26.21	35.10–46.41	59.41–69.48
n	23	29	26	26	28	30	162
Females	12	16	12	14	14	15
Wave 3	17.03 (0.48)	20.58 (0.39)	24.61 (0.41)	28.90 (0.67)	45.08 (3.02)	68.77 (2.58)
Range	15.83–17.69	19.84–21.39	23.84–25.73	27.19–29.73	39.32–49.74	63.66–72.71
n	23	27	26	23	22	29	150
Females	13	15	11	13	11	15
Wave 4	21.31 (0.61)	25.07 (0.43)	29.20 (0.65)	33.49 (0.77)	49.44 (2.89)	73.33 (2.56)
Range	20.01–22.59	24.46–26.28	28.09–30.77	31.59–34.49	42.88–52.75	68.05–77.11
n	24	22	20	21	20	28	135
Females	13	13	11	11	9	14
Wave 5	25.32 (0.51)	28.87 (0.34)	33.03 (0.68)	37.09 (0.77)	53.83 (3.03)	77.02 (2.57)
Range	24.08–26.25	28.17–29.67	31.83–34.75	35.33–38.08	47.17–58.33	71.92–80.58
n	23	23	22	22	20	27	137
Females	12	14	10	13	9	14
Total							698