Biomonitoring Study of Urinary Bisphenol A Levels and Impact of Bottle-Feeding Practices Among Infants and Children From Northern India.

OBJECTIVES: To compare the urinary bisphenol A (BPA) levels in bottle-fed and never bottle-fed infants and under-five children and to determine the impact of bottle-feeding practices and sociodemographic factors on urinary BPA levels. METHODS: A community-based cross-sectional study was carried out on children aged between 2 to 60 months attending the Anganwadi centres in Chandigarh. RESULTS: Urine samples were collected from 184 children, out of which 94.56% (n = 174) children had detectable urinary BPA levels. The mean (SD) BPA level was 2.74 (2.60) ng/ml and BPA was detected in 93.9% of 'ever' bottle-fed children (n = 93/99) and 95.3% of 'never' bottle-fed children (n = 81/85) (P = 0.69). On multivariate regression analysis, there were no significant predictors for high (≥ 75th percentile) urinary BPA levels. Still, the odds of urinary BPA levels ≥75th percentile showed higher trend for significance among children from middle/higher socioeconomic background in reference to lower socioeconomic stratum (adjusted OR 7.02; 95% CI 1.24, 133.25; P = 0.07) and among children whose feeding bottles were brushed once or twice daily in reference to group with no daily brushing (adjusted OR 3.92, 95% CI 0.95, 20.56; P = 0.07). CONCLUSIONS: Although feeding with plastic bottle did not emerge as a statistically significant risk factor for BPA exposure, yet detection of BPA levels among majority of study children signals urgent need for unmasking exposure to other sources given the potential long-term toxicity of BPA among infants and young children.

Assessment of acceptability of black wheat flour products and factors affecting it among Anganwadi beneficiaries and workers: A mixed-method prospective observational study.

Introduction: Malnutrition is very common in India and black wheat might be an acceptable solution to this problem. The aim of the study was to assess acceptability of black wheat flour products and factors affecting it among Anganwadi beneficiaries and workers. Materials and Methods: This was a mixed-method prospective observational study. All the family members enrolled for supplementary nutrition and Anganwadi workers/helpers of three randomly selected Anganwadi centers were taken in the study. For qualitative data, in-depth interview was done, and for quantitative data, 9-point hedonic scale was administered. Braun and Clarke's six-phase data analysis framework was used for qualitative data. Results: A total of 16 pregnant females, 14 lactating females, 16 children, 2 Anganwadi workers, and 3 Anganwadi helpers participated in the study. Thematic analysis of the data revealed five significant themes. It included characteristics of black wheat flour, the process of making the product (experience of making the product), family acceptability, availability, and hygiene. Participants expressed that the black color appearance is one of the negative influencers in the acceptability of black wheat flour. Most of the participants liked the taste as well as the texture. However, kneading, rolling, and puffing were more challenging than traditional wheat flour. On the hedonic scale, the mean rank of acceptability is lowest for color (3.03), followed by puffing (3.49) and highest for texture (4.87) and taste (4.60). Conclusion: Our study results revealed that black wheat is acceptable to the Anganwadi beneficiaries and workers.

Maternally transmitted anti-measles antibodies, and susceptibility to disease among infants in Chandigarh, India: A prospective birth cohort study.

Prior to the age of measles vaccination, infants are believed to be protected against measles by passively transferred maternal antibodies. However, the quantity and quality of such protection have not been well established in the Indian setting. We undertook this study to characterize the transfer and decline in maternal anti-measles antibodies among infants, and determine their susceptibility to measles. In this population-based, birth-cohort study, we enrolled pregnant women and their newborn infants, from a catchment area of 30 Anganwadis in Chandigarh, India. We collected maternal blood at delivery, and infant blood samples at birth, and 3, 6, and 9 months of age. Anti-measles IgG antibodies were measured using quantitative ELISA. We assessed antibody decline using log-linear models. In total, 428 mother-infant dyads were enrolled, and data from 413 dyads were analyzed. At birth, 91.5% (95% CI: 88.8, 94.2) of infants had protective antibody levels, which declined to 26.3% (95% CI: 21.0%, 31.9) at 3 months, 3.4% (95% CI: 0.9, 5.9) at 6 months, and 2.1% (95% CI: 0.1, 4.1) at 9 months. Younger mothers transferred lower levels of antibodies to their infants. We concluded that the majority of infants are susceptible to measles as early as three months of age, much earlier than their eligibility to receive measles vaccination.

Impact of Educational Intervention in Reducing the Weight of School Bags in Selected School Children.

Background: To assess the effectiveness of educational intervention to reduce the weight of school bags. Material and Methods: The study design was one group pre- and posttest experimental Research design. Place and Duration of Study: Government Senior Secondary School Dhanas, Chandigarh, and Shri Guru Harkrishan Model Senior Secondary School Sector-38D, Chandigarh (A private school) between July and November 2018. Names of the schools can be avoided. Total 760 students from selected sections nursery to 10th class of school were enrolled in the study. At baseline and end line weight of children, school bags and its content were weighed using weighing scale. Length of bag strap, breath of bag, torso of children, and their shoulders size were measured by measuring tape. Bag carrying style, posture, etc., were observed by observation checklist. Interviewed children (5th to 10th class) were using Nordic musculoskeletal questionnaire for musculoskeletal system assessment. Educational intervention was provided to the children for one month to reduce weight of school bag by teaching in assembly and displaying the charts in school. (Use of softbound thin textbooks, breaking thin books in 2-3 thin softbound books, use lightweight bag, pencil box, lunch box, and water bottles. Pack bag as per timetable.). Result: The result revealed that heavy school bags were carrying 69.7% children from government school and 80.2% from private school. Children carrying heavy bags reported musculoskeletal problems 5 times higher than their counterparts. After intervention, there was significant reduction in the weight of school bags (P < 0.001 as per paired t-test). Provide the weight of the bags before and after intervention in addition to the P value. Conclusion: Children carrying heavy bags were suffering from musculoskeletal problems. Intervention helped in reducing the weight of school bag.

Micronutrients and cognitive functions among urban school-going children and adolescents: A cross-sectional multicentric study from India.

BACKGROUND: Micronutrient deficiency (MD) is associated with deficits in cognitive functioning of children. However, no comprehensive multicentric study has been conducted in India to explore the role of multiple MD in cognition of children and adolescents. The present study aimed to explore association of MD with level of general intelligence and specific cognitive functions, in urban school-going children and adolescents across ten cities of India. METHOD: Cross-sectional multicentric study, enrolled participants aged 6-16 years. Blood samples were collected for biochemical analysis of calcium, iron, zinc, selenium, folate, vitamin A, D and B12. Colored Progressive Matrices / Standard Progressive Matrices (CPM/SPM), Coding, Digit Span and Arithmetic tests were used for the assessment of cognitive functions of participants. Height and weight measures were collected along with socio-economic status. RESULTS: From April-2019 to February-2020, 2428 participants were recruited from 60 schools. No MD was found in 7.0% (134/1918), any one MD in 23.8% (457/1918) and ≥ 2 MD in 69.2% (1327/1918) participants. In presence of ≥ 2 MD, adjusted odds ratio (OR) for borderline or dull normal in CPM/SPM was 1.63, (95% CI: 1.05-2.52), coding was 1.66 (95% CI: 1.02-2.71), digit span was 1.55 (95% CI: 1.06-2.25) and arithmetic was 1.72 (95% CI: 1.17-2.53), controlling for gender, socioeconomic status and anthropometric indicators. CONCLUSION: Since ≥ 2 MD were found in more than 2/3rd of participants and was associated with impairment in cognitive function, attempts must be made to ameliorate them on priority in school going children in India. TRIAL REGISTRATION NUMBER: CTRI/2019/02/017783.

Translation, Adaptation, and Validation of Hindi version of Quality of Life of the Infant (QUALIN) for Use in Infants and Toddlers.

OBJECTIVES: To translate Quality of Life of the Infant (QUALIN), cross-culturally adapt the Hindi version of QUALIN (Hi-QUALIN), and evaluate its psychometric properties in children. METHODS: This cross-sectional study was performed at the tertiary-care center in North India over 21 mo (April 2019 to January 2021). Healthy children (aged 3 to 36 mo) visiting the hospital for vaccination, minor ailments, routine health checkup, and accompanying an ill sibling were included. Children with infantile spasms in same age group were also included. Hindi translations were carried out by bilingual translators who could fluently communicate and write in Hindi and English. Standard Hindi was used to avoid the misinterpretation or misunderstanding. Discriminant and Construct validity was determined utilizing the known-groups method and factor analysis. Reliability was analysed as internal consistency and test-retest reliability. RESULTS: Four hundred and sixty-four children were recruited through opportunity sample selection method with statistically significant difference between healthy and unhealthy children in total score of Hi-QUALIN (3-12 mo) and (13-36 mo). Finally, Hi-QUALIN (3-12 mo and 13-36 mo) consisted of 29 and 30 items constituting the five extracted factors respectively. Overall internal consistency was excellent (α = 0.92 and 0.88, respectively). Intra-class correlation coefficients (ICC) were 0.84 (95% CI: 0.78-0.89; p <0.0001) and 0.94 (95% CI: 0.93-0.96; p <0.0001) indicating excellent test-retest reliability. CONCLUSIONS: Hi-QUALIN has good psychometric properties and can be used for health-related quality of life (HRQoL) measurement in young children.

Incidence of lymphadenitis following Bacillus Calmette-Guérin (BCG) vaccination in north Indian children.

INTRODUCTION: Bacillus Calmette-Guerin (BCG) vaccination is given as a part of the national immunization schedule in India and its most common complication is BCG lymphadenitis. The reported incidence of BCG lymphadenitis ranges from 0.1 to 9.9% in various studies. In our country, though most babies get BCG vaccination during the neonatal period, the incidence of BCG lymphadenitis is not studied well. AIMS: To study the incidence of lymphadenitis following BCG vaccination at tertiary care hospital in North India. METHODS: It was a prospective longitudinal observational study. All newborns weighing ≥1.5 kg at birth without any significant illness who received BCG vaccination at our institute were enrolled and followed up for 16 weeks after vaccination. Babies were examined at 6, 10 and 14 weeks for the development of lymphadenopathy. Meta-analysis of studies evaluating incidence of BCG adenitis in children was also performed. RESULTS: Out of 817 babies vaccinated during the enrolment period, 605 babies could be followed up till 16.2 ± 0.9 weeks post BCG vaccination. One case of BCG lymphadenitis was detected at 14 weeks. Thus, the observed incidence of BCG lymphadenitis was 0.16% (95% CI of 0.004%-0.92%). Meta-analysis of 21 studies showed mean incidence estimate of 0.336% (95% CI: 0.315%-0.358%) using fixed effect model whereas random effect model showed mean incidence of 4.45% (95% CI: 3.02%-6.15%). CONCLUSION: The lower incidence of lymphadenitis in our study can probably be attributed to a less immunogenic vaccine (Danish 1331), proper technique, experience of the vaccinator and good storage facilities available at our institute.

Measles seroprevalence in persons over one year of age in Chandigarh, India.

Measles continues to result in focal outbreaks in India, despite over three decades of universal infant vaccination. The aims of this study were to examine measles immunity in the population of Chandigarh, India, and to compare immunity by vaccination vs. natural infection. In a cross-sectional study of individuals 1-60 years selected from 30 communities within Chandigarh during 2017-2018, measles immunity was assessed using serological surveys. Seropositivity was compared across demographic groups, and by prior history of vaccination and natural history of infection. Among those 1-20 years old, measles seropositivity, and histories of measles vaccination or prior measles diagnosis were separately assessed as outcomes in logistic regression models, with demographic factors as independent variables. Among 1690 participants, 94% were seropositive, and 6% had borderline or negative antibody levels. Of those positive, 30% had prior vaccination, 16% had a history of natural infection, and 54% had an unknown history. Over 50% of individuals among those >20 years old, had unknown history of immunity. In the multivariable regression models, vaccination was more common in younger ages (P < .0001), and in males compared to females (P = .0220), and in those with more education (P < .0001). The majority of the population was seropositive, and seropositivity increased with age. Older age groups were more likely to be protected because of previous natural infection, whereas younger age groups were protected by vaccination. There was inequity in vaccination coverage by gender, and maternal education status.

Measles Vaccination Immunogenicity and Association with Caste in Chandigarh, India.

Measles affects those of lower socioeconomic status disproportionately. This study evaluated the impact of measles vaccination on antibody titers 3 months after vaccination across different socioeconomic groups, with a focus on caste. In total, 169 infants in Chandigarh, India, had serum samples collected immediately prior to vaccination at 9 months of age and 3 months later. Overall, 126 infants (76%) were seropositive (antibody titers > 12 mIU/mL), 26 (16%) were borderline (8-12 mIU/mL), and 14 (8%) were seronegative (< 8 mIU/mL). Seropositivity (versus borderline/seronegative infants) was 0.78 times as high among individuals from the historically marginalized scheduled castes/scheduled tribes compared with the others caste grouping (95% CI, 0.62-0.98). Antibody response was not tied to anthropometric measures but was attenuated among scheduled castes/scheduled tribes with higher incomes. This study provides observational evidence that social structures can be associated with individual immune responses.

Effectiveness of health promoting schools: A comparative health profile assessment of higher as compared to low accredited schools in Chandigarh, Union Territory of North India.

OBJECTIVES: To assess and classify all private and government schools located in a northern city of India for accreditation as health promoting schools and comparative health profile assessment of selected higher accredited schools with lower accredited and non-accredited schools. DESIGN: Quasi experimental study with pre and post assessment with comparison of higher with lower accredited schools. SETTINGS: The current study was conducted in 206 schools of Chandigarh City of Northern India. Comparative health profile assessment was undertaken in 8 schools with 754 children from higher accredited (platinum, gold, silver) and 8 schools with 700 children from lower accredited (bronze) and non-accredited (below bronze) schools. INTERVENTIONS: Multicomponent and multilevel intervention was undertaken with self-quality improvement by schools with help of a manual of accreditation of school as health promoting schools. Key intervention included capacity building, technical visits, supportive supervision, sensitization of policymakers and key stakeholders, implementation of policy initiatives, use of social media, technical support and monitoring of activities. OUTCOMES: Accreditation levels (bronze, silver, gold and platinum levels) as health promoting schools after pre and post intervention. RESULTS: Out of 206 schools, 203 participated in the baseline assessment and 204 in the endline assessment. The response rate was 99%. Two schools which refused participation were excluded and not assessed. Schools (N = 17) which participated in the 2011-2013 study were excluded from analysis. There was a statistically difference (p = 0.01) in the improvement of accreditation level of the baseline and endline assessment after intervention(p<0.05). Overall, the proportion of schools at the gold level increased from 1(0.5%) in 2016 to 71(38%). Silver level from 9(5%) to 57 (31%) of schools after intervention. The response rate in health profile assessment in higher(8) and lower(8) accredited schools was 95.9% and 92.7% respectively. The health profile of children higher accreditation level schools (N = 754) were found better in hygiene practices protective factors (peer support at school, parental or guardian supervision), handling stress and less prone to injury as compared to lower accreditation level schools (N = 700),(p<0.05). CONCLUSIONS: The health promoting school programme was found to be feasible and effective and lead to significant improvement in accreditation level as compared to baseline assessment after continuous self-quality improvement by schools(p<0.05). The health profile of children studying in higher accredited schools was better as compared to lower accredited schools.

A descriptive study on child sexual abuse act in India.

Background: Child sexual abuse (CSA) is a significant public health problem. Health care professionals can play an important role in the identification and reporting of such cases. This study was conducted to assess the awareness level among doctors working in a medical Institute about CSA. Materials and Methods: This is a cross-sectional descriptive study. Data was collected using a closed-ended structured questionnaire. Descriptive analysis was done to compute percentages and frequencies. Respondents' educational qualification, as well as the relationship between their level of education and their awareness of child abuse, was also assessed. Results: Nearly 70% of respondents came across child abuse cases, wherein sexual abuse was found to be the commonest (58%), followed by physical abuse (28%). Nearly 40% of child abuse cases were reported in the hospital where they worked, while 15% of child abuse cases occurred in other hospital areas. The study also revealed that 81% of respondents had knowledge about child sexual abuse. However, only 34% were aware of the repercussions of non-reporting of a child abuse case. Nearly 64% of respondents had an idea about an online complaint system for child abuse, and 70% were aware of the availability of a one-stop centre at a respondent's hospital. The majority (68%) were aware of the POCSO (Protection of Children from Sexual Offences) Act on sexual abuse. On seeking information regarding evidence of anal sexual abuse among children and adolescents, 36% were completely aware, and 13% were partly aware of it. Conclusion: There is a need for continued education and advancement of all health care professionals to improve the diagnosis and reporting of CSA.

Comprehensive overview of smartphone applications delivering child nutrition information.

Numerous smartphone-based applications that guide parenting, child nutrition, and child health-related knowledge are available. Here, we reviewed the applications available in the Google Play Store for child nutrition, primarily focused on children aged <5 y. The keywords used in the search were "child nutrition," "child nutrition status assessment," and "parenting." We identified 370 apps from the play store and 33 qualified for the review. Among 33 apps, 3 were not updated in the last 3 mo, and 19 did not mention their source of information. Four apps did not require the child's name, date of birth, and sex for logging in. Twenty-three apps were available in English only. The output features of the selected apps were food, growth, development and vaccine trackers, data export, reminders, meal planner, feeding tips, list of food, recipes details, information about nutrients, and question/answer session with the expert. Only eight apps provided access to consultation with experts and three suggested nutrient requirements of the child. Three apps scored similarly based on features, although the feature types differed. Findings from this review suggest that the apps do not follow any uniform guidelines for delivering the child nutrition information to the caregivers. About 50% of apps did not mention the consulted source for its development, indicating the unavailability of uniform guidelines or policy documents for child nutrition app development. App-based intervention studies are recommended to assess the effectiveness of child nutrition/health smartphone applications.

Parenting a child with autism spectrum disorder: A qualitative study.

Background: Research in India has seldom studied caregivers' perceptions, experiences, and needs for information and personal support after an autism spectrum disorder (ASD) diagnosis. Objectives: The objectives of the study were to understand the perceived barriers for obtaining a diagnosis and the perspectives and experiences of parents of children with autism. Materials and Methods: Parents with a diagnosed ASD child (within a year of diagnosis) in the 3-8 years range were recruited from the Pediatric Psychology and Neurodevelopmental Clinic from a tertiary care teaching hospital in North India. An interview guide elicited information about experiences regarding obtaining an ASD diagnosis, perceived barriers and facilitators, reactions to diagnosis, postdiagnostic family and community experiences, and stress experienced by parents. Qualitative responses were analyzed using thematic analysis. Participants were recruited till there was a saturation of themes. The ethics clearance was provided by the institutional review board. Results: Twenty-eight caregivers of children with ASD were recruited for the study. Overall, nine themes were identified from the qualitative analysis of the interviews: two before diagnosis (delayed help-seeking and experiences with healthcare), one at the time of diagnosis disclosure (heightened emotional response to diagnosis), and six themes after the diagnosis (increased stress, behavioral challenges, deterioration in family relationships, negative attitudes of the family, seeking support, and moving forward with hope for the future). Conclusions: There are several barriers and gaps in the autism-related available services in the country, and there is a need to provide inclusive, supportive, culturally sensitive, and family-centered model of care for parents raising children with ASD.

Restricted and Repetitive Behaviors and Interests in Young Children with Autism: A Comparative Study.

OBJECTIVES: To examine the frequency of repetitive behaviors among children with autism spectrum disorder (ASD) and compare it to age-matched developmentally delayed (DD) and typically developing children (TD). METHODS: Twenty-five children (3-8 y) with a diagnosis of ASD were compared to two age-matched control groups namely the DD and TD groups. The Repetitive Behaviors Scale-Revised (RBS-R) was administered to the parents to assess the frequency, severity, and impairment associated with restricted, repetitive behaviors, and interests (RRBIs) displayed. The study was cleared by the institute ethics committee. RESULTS: The three groups were well matched on age and sex distribution and comparisons on the RBS-R showed that the ASD group had a significantly higher total score (F = 51.52, p = 0.0001) and number of items endorsed on the scale (F = 37.91, p = 0.0001). Stepwise multiple regression analysis revealed that 35.8% of the variance in the total RRBI score of the ASD children was explained by the age and severity of autism (F = 6.12. p = .008). Older children with severe ASD features had significantly higher total RRBI scores. CONCLUSIONS: RRBIs are not just specific to autism and should not be used in isolation to identify children with autism. Gaining a complete understanding of the complexity and variability of the restricted interests would help in improving the diagnostic procedures and in the development of a comprehensive therapeutic plan.

Hereditary Sensory and Autonomic Neuropathy: A Case Series of Six Children.

Objectives: Hereditary sensory and autonomic neuropathy (HSAN) is a group of rare disorders affecting the sensory and autonomic neurons. Herein, we describe the clinical and genetic profile of six children with HSAN. Methods: Hospital records of six children diagnosed with HSAN over 7 years (2011-2018) were retrieved. Clinical features, electrophysiological studies, and genetic reports were collected from the case files. Results: The presenting clinical features in these six cases were developmental delay, recurrent febrile episodes, rhinitis, recurrent nonhealing ulcers, burns, self-mutilations, chronic osteomyelitis, and corneal ulcers. Electrophysiology studies showed predominant sensory axonal neuropathy. Autonomic features noted were recurrent fever, constipation, abdominal distension, hypertension, and vasomotor rhinitis. Genetic testing was done with next-generation sequencing in all six children. Causative genetic variants were identified in the NTRK1, PRDM12, DST gene, and a novel compound heterozygous variant in the FLVCR1 gene. The diagnosis of HSAN was delayed in most of our children due to variable presentation and lack of awareness among the treating paediatricians. Conclusions: Although the clinical presentation of HASN is highly variable, it is dominated by pain and temperature insensitivity and self-mutilation. Our report of six children with HSAN expands the existing knowledge on phenotype and genotype spectrum of HSAN.

Financial Burden in Families of Children with West Syndrome.

OBJECTIVE: To evaluate the illness-related expenditure by families of children with West syndrome (WS) during the first year of illness and to explore the potential determinants of the financial drain. METHODS: This cross-sectional study was conducted at a tertiary care hospital between July 2018 and June 2020. Eighty-five children with WS who presented within one year from the onset of epileptic spasms were included. The details of the treatment costs (direct medical and nonmedical) incurred during the first year from the onset of epileptic spasms were noted from a parental interview and case record review. Unit cost was fixed for drugs and specific services. Total cost was estimated by multiplying the unit cost by the number of times a drug or service was availed. The determinants of the financial burden were also explored. RESULTS: The median monthly per-capita income of the enrolled families (n = 85) was INR 3000 (Q1, Q3, 2000, 6000). The median cost of treatment over one year was INR 27035 (Q1, Q3, 17,894, 39,591). Median direct medical and nonmedical expenses amounted to INR 18802 (Q1, Q3, 12,179, 25,580) and INR 6550 (Q1, Q3, 3500, 15,000), respectively. Seven families had catastrophic healthcare expenditure. Parental education and choice of first-line treatment were important determinants driving healthcare expenses. The age at onset of epileptic spasms, etiology, treatment lag, the initial response to treatment, and relapse following initial response did not significantly influence the illness-related expenditure by the families. CONCLUSION: WS imposes a substantial financial burden on the families and indirectly on the healthcare system.

Needle Fear among Children during Mass Measles Rubella (MR) Injectable Vaccination Campaign in North India: an Observational Study.

The cross-sectional observational study evaluated the prevalence and predictors of needle-fear among school-going children during mass Measles-Rubella (MR) immunization campaign (year 2017) in the north Indian city of Chandigarh. Fear of needle was assessed using a single-item self-report global question, anxiety was assessed using the Likert scale (score 1-5) and the standardized "Children Faces Scale" where facial responses were graded from 0 to 4. Out of a total sample of 2568 school children, 1225 (47.7%) reported needle fear (95% CI: 45.8%-49.6%) on a global single item assessment. On an anxiety related Likert scale, 52.3% did not respond (mainly younger children) and among those who responded, 42.6% (523/1226) showed significant anxiety (score of ≥3 on Likert scale of 1 to 5). Finally, 17.4% children (95% CI: 15.9%-18.9%) (n = 446/2568) scored 2 or above (indicating significant needle fear) on the 'Children Faces Scale' during the actual vaccination procedure. The needle fear were significantly increased among girl students as compared to boys (adjusted OR 2.58; 95% CI: 2.05-3.24, p < 0.001) as well as children accompanied by their parents (adjusted OR 2.05; 95% CI:1.57-2.69, p < 0.001). On the other hand, needle fear was significantly lowered in children studying in private schools as compared to public school children (adjusted OR 0.45; 95% CI: 0.28-0.74, p = 0.002). The needle fear, which was an overriding concern in the minds of girls, children accompanied by their parents, and public-school students, must be proactively addressed for successful mass vaccination campaigns. These findings assume further importance with recent international roll out of COVID 19 vaccine.

Analysis of reasons for loss to follow up in a prospective study in Chandigarh, India and impact from telecom changes.

OBJECTIVE: Mobile phones are used in research studies, to enroll and follow-up participants, collect data, and implement mHealth initiatives. We conducted a longitudinal study in a birth cohort, where infants were required to make four scheduled visits by 12 months of age. Families of those failing to attend scheduled follow-up visits, were contacted telephonically to ascertain the reasons, which were categorized as: not interested to continue participating, migrated, phone disconnected due to telecom change, or other reason. RESULTS: A total of 413 mother-infant dyads were enrolled. The overall attrition was 56%, with majority occurring at the first follow-up visit. This temporally coincided with a telecom service provider announcing strong incentives to switch providers. Attrition monotonically decreased at subsequent visits. The reasons were: moved away (13%), no longer interested (8%), phone disconnected (7%), and multiple other reasons (28%), the majority of whom had unreachable phones. Those who remained in the study and those lost to follow-up were similar on most demographic variables. Among common reasons for attrition in cohort studies, we experienced a new dimension introduced by telecom changes. These findings underscore the need to consider unexpected reasons for attrition in longitudinal studies, and design more robust methods to follow-up participants.