Taneepanichskul 1998.

Methods	Design: retrospective study examined weight change in long‐term users of DMPA versus IUC Location: family planning clinic at a hospital in Bangkok, Thailand Time frame: no information Sample size estimation and outcome of focus: no information
Participants	100 women, age 37 to 50 years, attending family planning clinic Inclusion criteria: used DMPA or IUC for 120 months (10 years); followed "regularly"; no history of smoking or alcohol intake IUC users had not used any hormonal contraceptive Exclusion criteria: developed chronic disease or metabolic disorder during DMPA or IUC use
Interventions	Method chosen 1) DMPA (N = 50) 2) Cu T380A IUC (N = 50)
Outcomes	Mean change in body weight Time frame: 120 months Weight measured in standard manner at 120 months; prior method not specified.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Users of DMPA "recruited randomly"; users of Cu T380A selected as controls
NOS selection (NRS)	High risk	Exposed: clinic population, older contraceptive users; used method for 10 years and regularly attended clinic Non‐exposed: same as exposed group but chose different contraceptive Exposure: presumably from clinic records
NOS comparability (NRS)	Low risk	Design: matched for age, parity, income, weight
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not feasible due to women presumably having chosen method
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No information; objective outcome measure
Incomplete outcome data (attrition bias) All outcomes	High risk	Loss to follow‐up: retrospective study of women who used method for 10 years and regularly attended clinic; may have recruited women with relevant data in charts Exclusions: developed chronic disease or disorder during method use; may have biased results because weight gain is associated with development of some diseases and disorders