Antenatal and Postpartum Depression: Prevalence and Associated Risk Factors among Adolescents’ in KwaZulu-Natal, South Africa

Table 1

Summary statistics of numerical variables ().

Variable	Min	Q25	Median	Q75	Max	Mean	SD
Age	14	17	18	19	19	17.92	1.2
Number of people contributing to household income	1	1	2	3	5	1.98	0.88

Q25 and Q75 represent the interquartile range (IQR). Q25 is the 25th percentile. Q75 is the middle value for the last half of the ranked-ordered data. Since the data is not normally distributed, it is usually better to report the medians and IQR, than it is to report the mean and standard deviation.