Table 5.

Quality assessment of studies included according to the Jadad scale.

Reference	Quality assessment of methodology based on Jadad scale
	Randomization	Appropriate method of randomization and description	Blinding				Description of dropouts/withdrawals	Jadad score (score out of 5)
			No blinding	Single blind	Double blind	Appropriate method of double blinding and description
Inhalation aromatherapy
[18]	Yes	Yes	No	No	Yes	Yes	No	4
[19]∗	Yes	No	Yes	No	No	NA	Yes	2
[20]	Yes	Yes	Yes	No	No	NA	Yes	3
[21]	Yes	No	No	Yes	No	No	No	1
[22]	Yes	Yes	No	No	Yes	No	Yes	4
Aromatherapy massage
[23]	Yes	No	Yes	No	No	NA	No	1
[24]	Yes	Yes	No	No	Yes	Yes	Yes	5
[25]	Yes	Yes	No	No	Yes	No	Yes	3
[26]	Yes	Yes	Yes	No	No	NA	NA	2
[19]∗	Yes	No	Yes	No	No	NA	Yes	2
[27]	Yes	Yes	No	Yes	No	No	Yes	3
[28]	Yes	Yes	Yes	No	No	No	No	2
[29]	Yes	No	Yes	No	No	NA	No	1

^∗In this study, both aromatherapy modalities were tested, inhalation aromatherapy and aromatherapy massage. Therefore, the study was included in both categories in the table. NA, not applicable.