The percentage of patients with asthma aged 14 or over and who have not attained the age of 20, on the register, in whom there is a record of smoking status in the preceding 15 months.

Organisation	Numerator	Denominator	Ratio	Centile
Arfon	308	327	94.2%	87
Meirionnydd	154	167	92.2%	73
Holywell & Flint	180	197	91.4%	57
Anglesey	290	318	91.2%	54
Wrexham Town	184	202	91.1%	51
West & North Wrexham	180	199	90.5%	45
Wales	13295	14724	90.3%
Mold Buckley & Caergwle	209	232	90.1%	42
Dwyfor	117	130	90.0%	39
Betsi Cadwaladr University Health …	2920	3253	89.8%	42
Conwy West	239	267	89.5%	37
Conwy East	250	280	89.3%	34
South Wrexham	193	219	88.1%	28
Deeside Hawarden & Saltney	219	250	87.6%	21
Central & South Denbighshire	170	198	85.9%	14
North Denbighshire	227	267	85.0%	6

QOF database

Betsi Cadwaladr University Health Board

Data for AST004W