Study	Reason for exclusion
Arneklo‐Nobin 1988	Data not presented per subgroup; unable to include statistical data.
Arosio 1989	Data not presented per subgroup; unable to include statistical data.
Arosio 1991	Data not present per subgroup; unable to include statistical data.
Baart 1986	Data not present per subgroup; unable to include statistical data.
Brouwer 1987	Not randomized
Caputi 1991	Data too subjective, no statistical outcomes report
Codella 1989	No placebo
Coffman 1989	Data not presented per subgroup; unable to include statistical data.
Davinroy 1993	Not randomized
Engelhart 1988	Dropout greater than 30 percent, does not meet inclusion criteria
Hansteen 1976	No control group
Klimiuk 1989	No control group
Kunnen 1988	Data not presented per subgroup; unable to include statistical data.
Longstaff 1985	Data not presented per subgroup; unable to include statistical data.
Lukac 1991	Not randomized
Maloney 1987	No useable data
Marasini 1988	Data not presented per subgroup; unable to include statistical data.
Marasini 1990	No placebo
Roald 1984	Did not meet inclusion criteria, no outcomes of interest
Seibold 1984	Not randomized
Tooke 1990	Data not presented per subgroup; unable to include statistical data.
van de Wal 1985	Same study as van de Wal 1987