Research Article

Risk Behaviors in Teens with Chronic Kidney Disease: A Study from the Midwest Pediatric Nephrology Consortium

Table 4

Ages (years) for first had sex, first had a drink, and first smoked marijuana.

VariableStatisticASK KIDDControlP value

Age (years) first had sexMean ± SD15.1 ± 1.614.6 ± 1.60.010
Median (IQR)15.0 (2.0)15.0 (2.0)
Range11–1711–17
25th14.014.0
75th16.016.0
n803189

Age (years) had first drinkMean ± SD14.1 ± 2.313.3 ± 2.60.007
Median (IQR)15.5 (2.0)13.5 (4.0)
Range8–178–17
25th13.511.5
75th15.515.5
n704805

Age (years) first smoked marijuanaMean ± SD13.8 ± 2.413.8 ± 2.10.988
Median (IQR)13.5 (2.0)13.5 (2.0)
Range8–178–17
25th13.513.5
75th15.515.5
n643282

IQR = interquartile range.