NCD Combined analytical dataset

Malawi, 2013 - 2016

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Reference ID

MWI-MEIRU-NCD-2013-v1.0

Producer(s)

Prof Moffat Nyirenda, Prof Shabbar Jaffar

Collections

Combined / Harmonized Datasets Karonga HDSS Lilongwe HDSS

Metadata

Documentation in PDF DDI/XML JSON

Created on

Nov 14, 2025

Last modified

Nov 19, 2025

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5274

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Systolic blood pressure (average) (D) (systolic)

Data file: ncd_combined_data_all

Overview

Valid: 30555

Invalid: 20

Minimum: 74

Maximum: 257.5

Mean: 122.4

Standard deviation: 17.473

Type: Continuous

Decimal: 0

Start: 177

End: 181

Width: 5

Range: 74 - 257.5

Format: Numeric

Imputation and derivation

Derivation

variable: sysbpf [first systolic result] (table[s]: ncdk_persexam & ncdl_persexam)
variable: sysbps [second systolic result] (table[s]: ncdk_persexam & ncdl_persexam)
variable: sysbpt [third systolic result] (table[s]: ncdk_persexam & ncdl_persexam)
Missing and highly inlikely (<60) values are removed, and an average of the second (sysbps) and third (sysbpt) reading used, unless one of those was not recorded, in which case the first (sysbpf) and second, or first and third readings are averaged.
recode sysbpf 999=. min/60=.
recode sysbps 999=. min/60=.
recode sysbpt 999=. min/60=.
gen systolic=(sysbps+sysbpt)/2
replace systolic=(sysbpf+sysbps)/2 if systolic==. /*1st & 2nd*/
replace systolic=(sysbpf+sysbpt)/2 if systolic==. /*1st & 3rd*/

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