Table 1:

Key sample and baseline characteristics by group. No significant differences were observed between groups.

Measure	Experimental Group (N=20; 13 females)	Control Group (N=20; 14 females)
Ethno-geographic background	Oceania (14), Oceania - North East Asia (1), Americas (2), South Central Asia (1), North West Europe (1), North East Asia (1)	Oceania (8), North East Asia (5), Americas (1), Americas - South East Europe (1), South Central Asia (1), North West Europe (1), South East - North West Europe (1), South East Asia (2)
	mean ± standard deviation (median) [minimum - maximum]	mean ± standard deviation (median) [minimum - maximum]
Age (years)	29 ± 7.7 (26.0) [19.0 - 45.0]	29.5 ± 7.9 (28.0) [19.0 - 49.0]
Sleep quality over past month: PSQI total scores	5.7 ± 2.4 (6.0) [1.0 - 11.0]	5.5 ± 1.5 (5.0) [4.0 - 8.0]
Self-reported lifetime meditation experience (hours)	20.8 ± 45.9 (1.0) [0.0 - 180.0]	20 ± 44.3 (0.8) [0.0 - 145.0]
Dispositional mindfulness scores:
FFMQ total	3.0 ± 0.4 (3.0) [2.5 - 4.4]	3.2 ± 0.4 (3.3) [2.5 - 3.7]
FFMQ observing	3.2 ± 0.6 (3.1) [2.3 - 4.4]	3.4 ± 0.6 (3.5) [2.6 - 4.5]
FFMQ describing	3.4 ± 0.6 (3.5) [2.3 - 4.3]	3.3 ± 0.6 (3.5) [2.1 - 4.3]
FFMQ acting with awareness	2.8 ± 0.7 (2.7) [1.8 - 4.6]	3.1 ± 0.7 (3.2) [2.1 - 4.3]
FFMQ non-judging	3.0 ± 0.8 (3.1) [1.6 - 4.5]	3.2 ± 0.8 (3.2) [1.4 - 4.4]
FFMQ non-reactivity	2.8 ± 0.7 (2.6) [2.0 - 4.6]	2.9 ± 0.6 (2.9) [1.6 - 3.6
Dispositional mind-wandering scores: MWQ	4.0 ± 0.9 (4.0) [2.2 - 5.4]	3.8 ± 0.8 (3.9) [2.6 - 5.0]
Dispositional anxiety scores: STAI-T	2.2 ± 0.6 (2.3) [1.0 - 3.1]	2.2 ± 0.5 (2.1) [1.6 - 3.4]

PSQI - pittsburgh sleep quality index; FFMQ - five facet mindfulness questionnaire; MWQ - mind-wandering questionnaire; STAI-T - state and trait anxiety inventory - trait module; Ethno-geographic background classified using typology recommended by the Australian Bureau of Statistics (https://www.abs.gov.au/ausstats/abs@.nsf/Previousproducts/1249.0Main%20Features42011?opendocument&tabname=Summary&prodno=1249.0&issue=2011&num=&view=)