Table 2 Variables, categories and the percentage missing

Gender

male/female

0

Neonatal care

yes/no

3.7

Birth weight

up to 2.5 kg/>2.5 kg/don’t know

1.0

Fear in neighbourhood

yes/no

6.5

Smoked while pregnant

yes/no

50.

Smokers in the home

yes/no

0.3

Smoke exposure in vehicles

yes/no

7.6

Exercise

Up to once a week/2-4 times a week/>4 times a week

6.3

TV watching

Up to an hour a day/1-3 hours a day/>3 hours a day

6.5

Number people in home

1-4/5-7/8+

9.2

Income (monthly)

up to R1000/R1001-R4500/R4501-R10000/R10001+

19.4

Food availability

not always enough/enough

8.4

Perceived weight

overweight/underweight/correct weight

6.8

Work and wear

yes/no

3.7

Pets at home ever

yes/no

1.0

Area

South Durban/North Durban

0

Breakfast habits

Not every day/daily

6.5

Violence experienced

yes/no

7.3

Attacked with weapons

yes/no

7.3

Stove type

paraffin/gas/electric/none

9.9

Age

0

Asthma severity

Moderate-severe/mild persistent/mild intermittent/no asthma

0