Set	Results
# 19	2634	#18 OR #15 OR #12
# 18	141	#17 AND #10
# 17	999,282	#16 NOT (#11 OR #13)
# 16	1,931,491	TS=(economic* OR cost* OR pharmacoeconomic* OR pharmaco‐economic* OR "value of life" OR "quality adjusted life year*" OR qaly* OR qald* OR qale* OR "disability adjusted life year*" OR daly* OR sfg OR "short form 6" OR shortform6 OR "quality of life" OR euroqol oR "euro quality" OR eq5d OR eq‐5d OR hye OR "health year equivalent*" OR "healthy year equivalent*" OR "willingness to pay" OR "standard gamble" OR "time trade off" OR "time tradeoff" OR tto OR vas OR "visual analog" OR "resource use" OR "resource utilisation" OR "decision tree*" OR "decision model*" OR "decision analysis")
# 15	1500	#14 AND #10
# 14	10,439,530	#13 NOT #11
# 13	11,998,514	TS=(intervention? or effect? or impact? or controlled or control group? or (before SAME after) or (pre SAME post) or ((pretest or "pre test") and (posttest or "post test")) or quasiexperiment* or "quasi experiment*" or evaluat* or "time series" or "time point?" or "repeated measur*")
# 12	993	#11 AND #10
# 11	3,030,368	TS=(random* or blind* or allocat* or assign* or trial* or placebo* or crossover* or cross‐over*)
# 10	4704	#9 OR #8 OR #7 OR #6 OR #5 OR #4 OR #3 OR #2 OR #1
# 9	280	TS=((("near miss*" or "significant event*" or "critical event*" or "critical incident?") and (maternal or mother* or maternity or child* or infan* or p?ediatric* or fetal or foetal or perinatal or pregnan* or childbirth or birth or labo?r) and (review* or audit* or meeting? or enquir* or inquir*)))
# 8	543	TS=((("verbal autops*" or "social autops*") SAME (maternal or mother* or maternity or child* or infan* or p?ediatric* or fetal or foetal or perinatal or pregnan* or childbirth or birth or labo?r)))
# 7	37	TS=("saving mothers lives" or "making pregnancy safer" or "making childbirth safer")
# 6	101	TS=(cemach or cmace or cemd or cmde)
# 5	66	TS=(confidential enquir* or confidential inquir*) AND TS=(stillbirth? or sudden infant death? or sids or cot death? or crib death?)
# 4	286	TS=(confidential enquir* or confidential inquir*) AND TS=(((maternal or mother* or maternity or child* or infan* or p?ediatric* or fetal or foetal or perinatal or pregnan* or childbirth or birth or labo?r) NEAR/3 (mortality or death?)))
# 3	1254	TS=(((stillbirth? or sudden infant death? or sids or cot death? or crib death?) SAME (review* or audit* or meeting? or enquir* or inquir*)))
# 2	1247	TS=(((death? or mortality) NEAR/3 (review* or audit* or meeting? or enquir* or inquir*))) AND TS=(maternal or mother* or maternity or child* or infan* or p?ediatric* or fetal or foetal or perinatal or pregnan* or childbirth or birth or labo?r)
# 1	1916	TS=(((maternal or mother* or maternity or child* or infan* or p?ediatric* or fetal or foetal or perinatal or pregnan* or childbirth or birth or labo?r) NEAR/3 (mortality or death?))) AND TI=(review* or audit* or meeting? or enquir* or inquir*)