Table 3.

Distribution of time spent in the water (in minutes) among swimmers, by age

	Males	Females	Freshwater	Marine
Under 1
Mean	64.4	51.8	56.0	60.5
Median	45.0	30	37.5	45.0
Standard Deviation	67.4	55.3	69.1	61.2
Minimum-Maximum	1–300	2–300	5–300	1–300
Age 1–3
Mean	76.6	73.0	66.7	79.1
Median	60.0	60.0	60.0	60.0
Standard Deviation	67.7	62.5	56.0	69.3
Minimum-Maximum	2–420	1–480	2–300	1–480
Age 4–7
Mean	102.7	100.9	88.5	107.8
Median	90.0	90.0	60.0	90.0
Standard Deviation	75.5	76.1	62.8	80.3
Minimum-Maximum	1–600	1–600	2–300	1–600
Age 8–12
Mean	114.2	112.1	92.9	121.4
Median	102.5	90.0	60.0	120.0
Standard Deviation	80.0	81.7	64.7	85.4
Minimum-Maximum	1–600	2–600	2–360	1–600
Age 13–18
Mean	100.3	82.2	64.0	102.0
Median	75.0	60.0	45.0	90.0
Standard Deviation	80.6	72.9	58.1	81.4
Minimum-Maximum	1–600	1–600	1–360	1–600
Adults 19–34
Mean	65.5	56.2	45.4	68.2
Median	45.0	30	30.0	45.0
Standard Deviation	63.1	58.2	47.4	65.2
Minimum-Maximum	1–480	1–600	1–360	1–600
Adults 35 and over
Mean	67.4	55.3	47.0	66.9
Median	60	30	30.0	45.0
Standard Deviation	62.1	57.4	45.6	64.0
Minimum-Maximum	1–600	1–600	1–360	1–600
Kruskal Wallis p-value	<0.0001	<0.0001	<0.0001	<0.0001