# ▼	Searches	Results
1	(infant mortality/ or maternal mortality/ or neonatal mortality/ or perinatal mortality/ or stillbirths/) and (review* or audit* or meeting? or enquir* or inquir*).ti,ab.	1730
2	(children/ or preschool children/ or infants/) and ("cause of death"/ or Mortality/) and (review* or audit* or meeting? or enquir* or inquir*).ti,ab.	2698
3	((pregnancy complications/ and ("causes of death"/ or mortality/)) or sudden infant death syndrome/) and (review* or audit* or meeting? or enquir* or inquir*).ti,ab.	330
4	(((death? or mortality) adj3 (review* or audit* or meeting? or enquir* or inquir*)) 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)).ti,ab.	669
5	((stillbirth? or sudden infant death? or sids or cot death? or crib death?) adj5 (review* or audit* or meeting? or enquir* or inquir*)).ti,ab.	99
6	((confidential enquir* or confidential inquir*) 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) adj3 (mortality or death?))).ti,ab.	87
7	((confidential enquir* or confidential inquir*) and (stillbirth? or sudden infant death? or sids or cot death? or crib death?)).ti,ab.	10
8	(cemach or cmace or cemd or cmde).ti,ab.	5
9	(saving mothers lives or making pregnancy safer or making childbirth safer).ti,ab.	16
10	((verbal autops* or social autops*) adj5 (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)).ti,ab.	92
11	((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*)).ti,ab.	96
12	1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11	4573
13	(random* or blind* or allocat* or assign* or trial* or placebo* or crossover* or cross‐over*).ti,ab.	280,984
14	12 and 13	635
15	(multicenter or multi center or multicentre or multi centre).ti.	5213
16	(intervention? or effect? or impact? or controlled or control group? or (before adj5 after) or (pre adj5 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*).ti,ab.	1,302,529
17	15 or 16	1,304,574
18	17 not 13	1,108,174
19	12 and 18	1757
20	economics/ or economic evaluation/	8105
21	economic analysis/ or "cost analysis"/ or "cost benefit analysis"/ or "cost effectiveness analysis"/	12,451
22	(Cost* adj2 (Effective* or analysis* or Utility* or Benefit* or Minimi*)).ti,ab.	25,527
23	(pharmacoeconomic* or pharmaco‐economic*).ti,ab.	348
24	economic*.ti.	11,263
25	economic evaluation*.ti,ab.	1620
26	("Value of life" or "quality adjusted life year*" or qaly* or qald* or qale* or "disability adjusted life year*" or daly).ti,ab.	3740
27	(sf6 or short form 6 or shortform6 or euroqol or euro quality of life or eq5d or eq‐5d).ti,ab.	673
28	(hye or health* year equivalent*).ti,ab.	1
29	(health utilit* or disutilit*).ti,ab.	215
30	"willingness to pay".ti,ab.	1630
31	standard gamble.ti,ab.	34
32	(time trade off or time tradeoff or tto).ti,ab.	191
33	(vas or visual analog*).ti,ab.	3901
34	((economic adj2 model*) or markov or monte carlo method).ti,ab.	2861
35	(decision* adj (tree* or model* or analysis)).ti,ab.	1810
36	(resource* adj (use* or utilisation)).ti,ab.	1304
37	((healthcare or health care or direct service or hospital or drug*) adj cost*).ti,ab.	4359
38	20 or 21 or 22 or 23 or 24 or 25 or 26 or 27 or 28 or 29 or 30 or 31 or 32 or 33 or 34 or 35 or 36 or 37	56,861
39	38 not (14 or 19)	56,715
40	12 and 39	39
41	14 or 19 or 40	2431