|Explained variance (R2% by Nagelkerke) of having the first baby at anadvancedandvery advancedpaternal age; 35-39 years vs ≥40 years, compared with men aged 25-34 years in four blocks of exposure variablesa|
|Explained variance of each block||Cumulative explained variance|
|35-39 yrs||≥40 yrs||35-39 yrs||≥40 yrs|
|Health behaviour, physical and mental problems||4.0||6.8||10.5||14.3|
|Planning of pregnancy||2.7||2.7||12.5||16.5|
aBlocks entered either as first block (Explained variance of each block) or in sequential order (Cumulative explained variance).
bVariables in each block as in Table 2.
Nilsen et al.
Nilsen et al. BMC Pregnancy and Childbirth 2013 13:29 doi:10.1186/1471-2393-13-29