Participants included	Inclusive analysis	3 months	6 months	12 months	20 months	48 months
Thoracotomy	499 (7 studies)	120	279	77	23	0
Cardiac surgery	116 (2 studies)	38	78	0	0	0
Breast cancer surgery	1297 (18 studies)	745	439	113	0	0
Caesarean section (dichotomous)	551 (4 studies)	59	414	78	0	0
Caesarean section (continuous)	110 (2 studies)	39	71
Iliac crest bone graft	123 (3 studies)	45	0	58	0	20
Prostatectomy	150 (2 studies)	150	0	0	0	0
Hysterectomy	297 (3 studies)	135	162	0	0	0
Sum	3143 (41 studies)	1331	1443	326	23	20

The table of included participants provides a detailed census of the 3143 participants in 41 studies pooled in our inclusive analysis (Data synthesis/inclusive analysis). We provide a breakdown of the number of participants that contributed data at different followup intervals. The first column lists the total number of participants pooled for each surgical subgroup; subsequent columns break the participants down by follow-up interval. The last row sums participants at different follow-ups. Most of the study data were observed at three and six months after surgery. If a study reported outcomes at more than one follow-up, we counted the study data only once, at the last follow-up reported for that study (Unit of analysis issues).