Table 1

Children with complete versus incomplete data

Complete data (n=269)Incomplete (or no) data (n=80)Significance of difference
Sex (male)59%16053%420.62
Parental asthma56%15145%360.10
Ethnicity
 Māori32%8749%390.01
 Pacific Island22%589%70.01
 NZ European67%18058%470.22
 Other9.3%2559%50.53
Region
 Porirua27%728%60.0005
 Hutt Valley24%6556%45<0.0001
 Christchurch33%895%4<0.0001
 Dunedin/Bluff16%4331%250.004
School
 Contributing32%8535%280.66
 Full primary32%8743%340.12
 Intermediate20%5314%110.30
 Secondary16%449%70.13
Income
 <$38 00038%10239%310.98
 $38 000–$60 00027%7219%150.19
 >$60 00017%4625%200.16
 Not specified18%4918%140.98
Smoking inside21%5721%170.89