L linkage study. BMJ Open 2016;6:e008758. doi:10.1136/bmjopen-2015008758 Prepublication history for

To assess the Y marginally {more|much more|a lot more|far more|additional impact of socioeconomic status, age and parity on admission rates. 3290 pregnancy-related psychiatric admissions were assessed. Weekly admission rates were calculated for the pregnancy period, early postpartum N Much better {Health|Well period (6 weeks after birth) and late postpartum period (up to 2 years after birth), and compared with pre-pregnancy rates (up to 2 years before pregnancy). Admission rates were generated by calculating the total number of admissions for each time period divided by the number of weeks in the period. Incidence rate ratios (IRRs) were generated for each time period, using deprivation, age, parity and record of previous psychiatric hospital care-adjusted Poisson regression models. Admission with non-psychotic depression was the most common diagnosis for all other time periods. Although admissions for personality disorder accounted for 18.3 of pre-pregnancy admissions, the proportion of personality disorder admissions during pregnancy and within the extended postpartum period was notably lower (9.2 and 12.0 , respectively) (table 1). Influence of social deprivation, maternal age parity and previous psychiatric care on admission rates When compared with the pre-pregnancy period, women admitted during the early postpartum were older (mean age 29.22 vs 26.36 years, p