Single-parent adolescents are vulnerable individuals and it is necessary to improve their health, particularly during epidemics. This study aimed to investigate the effects of virtual logotherapy (VL) on health-promoting lifestyle (HPL) among single-parent adolescent girls during the COVID-19 pandemic. This single-blind randomized clinical trial was conducted on 88 single-parent adolescent girls recruited from the support organization for vulnerable individuals in Tehran, Iran. They were randomly allocated to a control and an intervention group through block randomization. Participants in the intervention group received VL in three–five person groups in 90 min biweekly sessions. The Adolescent Health Promotion Short-Form was used to assess HPL. Data were analyzed using the SPSS software (v. 26.0) and through the independent-sample t, Chi-square, Fisher’s exact, and Mann–Whitney U tests. There was no significant difference between the intervention and the control groups respecting the pretest mean score of HPL (73.58±16.74 vs. 72.80±9.30; P=0.085). However, the posttest mean score of HPL in the intervention group (82 with an interquartile range of 78–90) was significantly more than the control group (71.50 with an interquartile range of 63.25–84.50) (P=0.001). Moreover, after adjusting the effects of the significant between-group differences respecting pretest mean scores, the pretest–posttest differences of the mean scores of HPL and all its dimensions in the intervention group were significantly more than the control group (P<0.05). VL is effective in significantly improving HPL among single-parent adolescent girls. Healthcare authorities are recommended to use VL for health promotion among single-parent adolescents.Trial registrationThis research was registered (17/05/2020) in the www.thaiclinicaltrials.org with registration number: TCTR20200517001.

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Objectives: Effective interventions such as non-nutritive sucking (NNS) improve neonatal development. The current study aimed at assessing the effect of NNS intervention by mothers on physiological factors, duration of full oral feeding attainment, and the length of hospital stay. Methods: The current clinical trial was conducted in the neonatal care unit (NICU) of Arash hospital affiliated to Tehran University of Medical Sciences, Tehran, Iran. The study was conducted on 2 groups of 38 preterm neonates. Neonates had gestational age of 26-34 weeks and received gavage feeding. They did not have assisted ventilation. Control neonates received routine care, whereas the intervention neonates received 3 NNS sessions done by mothers during the first 10 minutes of tube feeding per day. Data collection instrument included a mother-infant demographic form and an observation checklist of infant's physiological features. The date of full feeding and length of hospitalization were recorded. Results: Findings did not show any statistically significant correlation between groups in physiological features. Duration of full oral feeding attainment in the intervention and control groups were 22 ± 14.51 and 30.05 ± 18.58 days, respectively. The length of hospital stay in the intervention and control groups were 31.26 ± 16.89 and 41.82 ± 23.07 days, respectively. Then, non-nutritive sucking by mother's finger sped up the duration of full oral feeding attainment and reduced the hospitalization. Conclusions: Since NNS does not require skill and expertise, participation of mother is recommended. Then, infants benefit from not only the positive effects of NNS, but also mother-infant interaction.