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Table 1 Socio-demographic and anthropometric characteristics of primary school children in Dar es Salaam, Tanzania

From: Elevated blood pressure among primary school children in Dar es salaam, Tanzania: prevalence and risk factors

Characteristic Mean ± SD or N (%)
Age (years) 11.1 ± 2.0
Age category
  ≤ 10 years 138 (30.9)
  > 10 years 308 (69.1)
Gender
 Boys 209 (46.9)
 Girls 237 (53.1)
Place of residence
 Rural 197 (44.2)
 Urban 249 (55.8)
Body mass (kg) 34.1 ± 11.8
Height (cm) 142.1 ± 13.3
BMI (kg/m2) 16.6 ± 4.0
BMI-defined categories
 Underweight 65 (14.6)
 Normal 314 (70.4)
 Overweight 44 (9.8)
 Obese 23 (5.2)
SBP (mmHg) 103.9 ± 10.3
DBP (mmHg) 65.6 ± 8.2
Blood pressure categories
 Normal BP 376 (84.3)
 Pre-hypertension 22 (4.9)
 Stage 1 hypertension 39 (8.8)
 Stage 2 hypertension 9 (2.0)
Elevated blood pressure
 Yes 68 (15.2)
 No 398 (84.8)
Hypertension
 Yes 48 (10.8)
 No 378 (89.2)
Number of adults in the family (≥18 years)
 Less than 6 adults 187 (41.9)
 6 and above adults 259 (58.1)
Number of children in the family (< 18 years)
 Less than 3 children 201 (45.1)
 3 and above children 245 (54.9)
Pocket money to spend at school
  ≤ 500 Tanzanian shillings 315 (70.6)
  > 500 Tanzanian shillings 131 (29.4)
  1. BMI Body Mass Index, DBP Diastolic Blood Pressure, SBP Systolic Blood Pressure, SD Standard Deviation