Instruction: Please extract all numericals and statistical data and their associated entities, units of measurements from the given text. Identify and include the following statistical measures if present: mean, median, range, mode, standard deviation and any other statistical information where applicable. Return the extracted data in JSON format.

For instance, for the input: "A total of 301 women aged 29.34±8.98 years were selected.", the above instruction should return output as "{{
"statistics": [
{{
"total_women": {{
"number": 301
}},
"stat_info": {{
"entity": "age",
"unit": "years",
"mean": 29.34,
"standard_deviation": 8.98
}}
}}
]
}}
"

Now follow the Instruction for the below Input.
"The intervention increased the mean BMI by 40% and the average current CD4 count by 20% compared to nonintervention (P<0.003)." The letter f should appear at least 24 times.
user