Second-hand smoke in four English prisons: an air quality monitoring study

BMC Public Health

Table 1 Prison facility characteristics

	Category and function^a	Structural design	Roll count	Wings	Smoke-free wings	Sampled
HMP 1	Female Closed Local	Built 1960s. Mix of original, T-shaped and quick build wings	262	7	Mother & Baby Unit	July 2014
HMP 2	Male Category C Training	Built 1960s. Mix of triangular, T-shaped and quick build wings	494	8	Care & Separation Unit	August 2014
HMP 3	Male Category B Local	Built 1850s. Victorian radial design	533	7	Healthcare	August 2014
HMP 4	Male Category B Local	Built 1992. Bullingdon design, with additional mix of wings	1215	9	Healthcare & 1 Smoke-Free Spur	October & November 2014

^aCategory B prisons hold prisoners for whom the very highest conditions of security are not necessary but for whom escape must be made very difficult
^aCategory C prisons hold prisoners who cannot be trusted in open conditions but who do not have the resources and will to make a determined escape attempt
^aFemale closed prisons can hold category A, B, C prisoners. Due to the smaller female prisoner population, female establishments are categorised into either ‘closed’ or ‘open’
^aLocal prisons serve the courts and receive remand and post-conviction prisoners prior to their allocation to other establishments
^aTraining prisons hold sentenced prisoners who tend to be employed in a variety of activities such as prison workshops, education and in offending behaviour programmes

ISSN: 1471-2458