Table 2. Participant characteristics: personal friendship networks.

	All (N = 310)			Male (n = 129)			Female (n = 181)
	Mean	SD	Range	Mean	SD	Range	Mean	SD	Range	p
Total friends nominated (outdegree)	6.1	3.2	0–15	5.5	2.8	1–15	6.5	3.4	0–15	<0.01
Personal network characteristics	Median	Q1	Q3	Median	Q1	Q3	Median	Q1	Q3	p
% of same sex friends	100	93	100	100	100	100	100	90	100	0.38
% not at the same school	0	0	0	0	0	0	0	0	13	<0.01
% in same year level	71	50	100	75	50	100	70	50	100	0.66
% usually play sport with	71	29	100	83	33	100	63	20	100	<0.01
Time/location of interaction with friends
% at recess	100	73	100	100	88	100	89	67	100	<0.01
% at lunch	90	67	100	100	77	100	83	60	100	<0.01
% after school	10	0	33	0	0	33	14	0	33	0.14
% on weekends	14	0	40	11	0	40	17	0	40	0.31
Perceived friend PA behavior
% very active	60	33	100	75	40	100	50	25	85	<0.01
% sometimes active	29	0	56	13	0	50	33	0	65	<0.01
% not very active	0	0	0	0	0	0	0	0	7	0.10
Multiplex relational characteristics
% friends with very frequent interaction 1	13	0	33	13	0	50	12	0	33	0.28
% friends with very frequent interaction who are very active 1	0	0	21	0	0	25	0	0	17	0.02
% friends at recess who are very active	50	21	80	67	33	100	36	15	67	<0.01
% friends at lunch-time who are very active	45	20	75	60	25	100	33	11	60	<0.01
% after school friends who are very active	0	0	20	0	0	25	0	0	18	0.79
% weekend friends who are very active	0	0	22	0	0	25	0	0	20	0.58

PA, physical activity; Q, quartile (Q1-Q3 interquartile range); SD, standard deviation

^p, test value for sex differences using t-test of means or Wilcoxon rank sum test of medians; boldface indicates statistical significance (p<0.05)

¹. Frequency of interaction at least 3 of 4 from recess, lunch, after school or weekends