Quantifying interaction with robotic toys in pre-term and full-term infants.

Infants born pre-term are at an increased risk for developmental, behavioral, and motor delay and subsequent disability. When these problems are detected early, clinical intervention can be effective at improving functional outcomes. Current methods of early clinical assessment are resource intensive, require extensive training, and do not always capture infants' behavior in natural play environments. We developed the Play and Neuro Development Assessment (PANDA) Gym, an affordable, mechatronic, sensor-based play environment that can be used outside clinical settings to capture infant visual and motor behavior. Using a set of classification codes developed from the literature, we analyzed videos from 24 pre-term and full-term infants as they played with each of three robotic toys designed to elicit different types of interactions-a lion, an orangutan, and an elephant. We manually coded for frequency and duration of toy interactions such as kicking, grasping, touching, and gazing. Pre-term infants gazed at the toys with similar frequency as full-term infants, but infants born full-term physically engaged more frequently and for longer durations with the robotic toys than infants born pre-term. While we showed we could detect differences between full-term and pre-term infants, further work is needed to determine whether differences seen were primarily due to age, developmental delays, or a combination.

Infants at risk for physical disability may be identified by measures of postural control in supine.

BACKGROUND: Early detection of delay or impairment in motor function is important to guide clinical management and inform prognosis during a critical window for the development of motor control in children. The purpose of this study was to investigate the ability of biomechanical measures of early postural control to distinguish infants with future impairment in motor control from their typically developing peers. METHODS: We recorded postural control from infants lying in supine in several conditions. We compared various center of pressure metrics between infants grouped by birth status (preterm and full term) and by future motor outcome (impaired motor control and typical motor control). RESULTS: One of the seven postural control metrics-path length-was consistently different between groups for both group classifications and for the majority of conditions. CONCLUSIONS: Quantitative measures of early spontaneous infant movement may have promise to distinguish early in life between infants who are at risk for motor impairment or physical disability and those who will demonstrate typical motor control. Our observation that center of pressure path length may be a potential early marker of postural instability and motor control impairment needs further confirmation and further investigation to elucidate the responsible neuromotor mechanisms. IMPACT: The key message of this article is that quantitative measures of infant postural control in supine may have promise to distinguish between infants who will demonstrate future motor impairment and those who will demonstrate typical motor control. One of seven postural control metrics-path length-was consistently different between groups. This metric may be an early marker of postural instability in infants at risk for physical disability.

Computer Vision to Automatically Assess Infant Neuromotor Risk.

An infant's risk of developing neuromotor impairment is primarily assessed through visual examination by specialized clinicians. Therefore, many infants at risk for impairment go undetected, particularly in under-resourced environments. There is thus a need to develop automated, clinical assessments based on quantitative measures from widely-available sources, such as videos recorded on a mobile device. Here, we automatically extract body poses and movement kinematics from the videos of at-risk infants (N = 19). For each infant, we calculate how much they deviate from a group of healthy infants (N = 85 online videos) using a Naïve Gaussian Bayesian Surprise metric. After pre-registering our Bayesian Surprise calculations, we find that infants who are at high risk for impairments deviate considerably from the healthy group. Our simple method, provided as an open-source toolkit, thus shows promise as the basis for an automated and low-cost assessment of risk based on video recordings.

Stereo 3D tracking of infants in natural play conditions.

This paper describes the design and implementation of a multiple view stereoscopic 3D vision system and a supporting infant tracker pipeline to track limb movement in natural play environments and identify potential metrics to quantify movement behavior. So far, human pose estimation and tracking with 3D cameras has been focused primarily on adults and cannot be directly extended to infants because of differences in visual features such as shapes, sizes and appearance. With rehabilitation in mind, we propose a portable, compact, markerless, low cost and high resolution 3D vision system and a tracking algorithm that exploits infant appearance attributes and depth information. This approach achieved a mean 3D tracking error of 8.21cm and a standard deviation of 8.75cm. We also identify two potential metrics for movement behavior analysis - approximate entropy and interaction events.

Quantifying infant physical interactions using sensorized toys in a natural play environment.

Infants with developmental delays must be detected early in their development to minimize the progression of motor and neurological impairments. Our objective is to quantify how sensorized toys in a natural play environment can promote infant-toy physical interactions. We created a hanging elephant toy, equipped with an inertial measurement unit (IMU), a pressure transducer, and multiple feedback sensors, to be a hand-grasping toy. We used a 3 DoF robotic model with inputs from the IMU to calculate multiple kinematic metrics and an equation to calculate haptic metrics from the pressure transducer. Six typical infants were tested in the gym set-up. Three infants interacted with the toy for more than half the trial time. The youngest infant exhibited the largest toy displacement with ΔD = 27.6 cm, while the oldest infant squeezed the toy with the largest mean pressure of 4.5 kPa. More data on on both typical and atypical infants needs to be collected. After testing atypical infants in the SmarToyGym set-up, we will be able to identify interaction metrics that differentiate atypical and typical infants.

Feasibility, acceptability and preliminary effectiveness of patient advocates for improving asthma outcomes in adults.

BACKGROUND: Asthmatic adults from low-income urban neighborhoods have inferior health outcomes which in part may be due to barriers accessing care and with patient-provider communication. We adapted a patient advocate (PA) intervention to overcome these barriers. OBJECTIVE: To conduct a pilot study to assess feasibility, acceptability and preliminary evidence of effectiveness. METHODS: A prospective randomized design was employed with mixed methods evaluation. Adults with moderate or severe asthma were randomized to 16 weeks of PA or a minimal intervention (MI) comparison condition. The PA, a non-professional, modeled preparations for a medical visit, attended the visit and confirmed understanding. The PA facilitated scheduling, obtaining insurance coverage and overcoming barriers to implementing medical advice. Outcomes included electronically-monitored inhaled corticosteroid (ICS) adherence, asthma control, quality of life, FEV1, emergency department (ED) visits and hospitalizations. Mixed-effects models guided an intention-to-treat analysis. RESULTS: 100 adults participated: age 47 ± 14 years, 75% female, 71% African-American, 16% white, baseline FEV1 69% ± 18%, 36% experiencing hospitalizations and 56% ED visits for asthma in the prior year. Ninety-three subjects completed all visits; 36 of 53 PA-assigned had a PA visit. Adherence declined significantly in the control (p = 0.001) but not significantly in the PA group (p = 0.30). Both PA and MI groups demonstrated improved asthma control (p = 0.01 in both) and quality of life (p = 0.001, p = 0.004). Hospitalizations and ED visits for asthma did not differ between groups. The observed changes over time tended to favor the PA group, but this study was underpowered to detect differences between groups. CONCLUSION: The PA intervention was feasible and acceptable and demonstrated potential for improving asthma control and quality of life.

The association of health literacy with adherence and outcomes in moderate-severe asthma.

BACKGROUND: Low health literacy is associated with poor outcomes in asthma and other diseases, but the mechanisms governing this relationship are not well defined. OBJECTIVE: We sought to assess whether literacy is related to subsequent asthma self-management, measured as adherence to inhaled steroids, and asthma outcomes. METHODS: In a prospective longitudinal cohort study, numeric (Asthma Numeracy Questionnaire) and print literacy (Short Test of Functional Health Literacy in Adults) were assessed at baseline in adults with moderate or severe asthma for their impact on subsequent electronically monitored adherence and asthma outcomes (asthma control, asthma-related quality of life, and FEV1) over 26 weeks, using mixed-effects linear regression models. RESULTS: A total of 284 adults participated: age, 48 ± 14 years, 71% females, 70% African American, 6% Latino, mean FEV1 66% ± 19%, 86 (30%) with hospitalizations, and 148 (52%) with emergency department visits for asthma in the prior year. Mean Asthma Numeracy Questionnaire score was 2.3 ± 1.2 (range, 0-4); mean Short Test of Functional Health Literacy in Adults score was 31 ± 8 (range, 0-36). In unadjusted analyses, numeric and print literacy were associated with better adherence (P = .01 and P = .08, respectively), asthma control (P = .005 and P < .001, respectively), and quality of life (P < .001 and P < .001, respectively). After controlling for age, sex, and race/ethnicity, the associations diminished and only quality of life (numeric P = .03, print P = .006) and asthma control (print P = .005) remained significantly associated with literacy. Race/ethnicity, income, and educational attainment were correlated (P < .001). CONCLUSION: While the relationship between literacy and health is complex, interventions that account for and address the literacy needs of patients may improve asthma outcomes.

Problem solving to improve adherence and asthma outcomes in urban adults with moderate or severe asthma: a randomized controlled trial.

BACKGROUND: Improving inhaled corticosteroid (ICS) adherence should improve asthma outcomes. OBJECTIVE: In a randomized controlled trial we tested whether an individualized problem-solving (PS) intervention improves ICS adherence and asthma outcomes. METHODS: Adults with moderate or severe asthma from clinics serving urban neighborhoods were randomized to PS (ie, defining specific barriers to adherence, proposing/weighing solutions, trying the best, assessing, and revising) or standard asthma education (AE) for 3 months and then observed for 3 months. Adherence was monitored electronically. Outcomes included the following: asthma control, FEV(1), asthma-related quality of life, emergency department (ED) visits, and hospitalizations. In an intention-to-treat-analysis longitudinal models using random effects and regression were used. RESULTS: Three hundred thirty-three adults were randomized: 49 ± 14 years of age, 72% female, 68% African American, 7% Latino, mean FEV(1) of 66% ± 19%, and 103 (31%) with hospitalizations and 172 (52%) with ED visits for asthma in the prior year. There was no difference between groups in overall change in any outcome (P > .20). Mean adherence (61% ± 27%) decreased significantly (P = .0004) over time by 14% and 10% in the AE and PS groups, respectively. Asthma control improved overall by 15% (P = .002). In both groups FEV(1) and quality of life improved by 6% (P = .01) and 18% (P < .0001), respectively. However, the improvement in FEV(1) only occurred during monitoring but not subsequently after randomization. Rates of ED visits and hospitalizations did not significantly decrease over the study period. CONCLUSION: PS was not better than AE in improving adherence or asthma outcomes. However, monitoring ICS use with provision of medications and attention, which was imposed on both groups, was associated with improvement in FEV(1) and asthma control.

Exposure to community violence is associated with asthma hospitalizations and emergency department visits.

BACKGROUND: Exposure to community violence (ECV) has been associated with asthma morbidity of children living in inner-city neighborhoods. OBJECTIVE: To examine with prospective longitudinal data whether ECV is independently associated with asthma-related health outcomes in adults. METHODS: Adults with moderate-severe asthma, recruited from clinics serving inner-city neighborhoods, completed questionnaires covering sociodemographics, asthma severity, and ECV and were followed for 26 weeks. Longitudinal models were used to assess unadjusted and adjusted associations of subsequent asthma outcomes (emergency department [ED] visits, hospitalizations, FEV(1), quality of life). RESULTS: A total of 397 adults, 47 +/- 14 years old, 73% women, 70% African American, 7% Latino, mean FEV(1) 66% +/- 19%, 133 with hospitalizations and 222 with ED visits for asthma in the year before entry, were evaluated. Ninety-one reported ECV. Controlling for age, sex, race/ethnicity, and household income, those exposed to violence had 2.27 (95% CI, 1.32-3.90) times more asthma-related ED visits per month and 2.49 (95% CI, 1.11-5.60) times more asthma-related hospitalizations per month over the 26-week study period compared with those unexposed. Violence-exposed participants also had 1.71 (95% CI, 1.14-2.56) times more overall ED visits per month and 1.72 (95% CI, 0.95-3.11) times more overall hospitalizations per month from any cause. Asthma-related quality of life was lower in the violence-exposed participants (-0.40; 95% CI, -0.77 to -0.025; P = .04). Effect modification by depressive symptoms was only statistically significant for the ECV association with overall ED visits and quality-of-life outcomes (P < .01). CONCLUSION: In adults, ECV is associated with increased asthma hospitalizations and emergency care for asthma or any condition and with asthma-related quality of life.

Adolescents and asthma: why bother with our meds?

BACKGROUND: Adherence to inhaled steroid regimens for asthma is poor in adults and children. Although it is assumed that nonadherence contributes to morbidity in older adolescents, investigation is limited. OBJECTIVE: We sought to describe adherence to preventive asthma medications and explore relevant beliefs and attitudes in older urban adolescents, including their ideas for improving adherence. METHODS: Quantitative and qualitative methods were used to collect data from a convenience sample of adolescents with asthma previously prescribed fluticasone/salmeterol (F/S). Two semistructured face-to-face interviews were conducted 1 month apart and analyzed for themes. F/S use was electronically monitored between visits and calculated as the number of actuations divided by the number of inhalations prescribed. RESULTS: Forty participants, (15-18 years of age, 19 female subjects, 30 black/African American subjects, 11 Medicaid-insured subjects, and 24 previously hospitalized for asthma) with a median FEV1 of 98% of predicted value (range, 67% to 127%) had median adherence of 43% (range, 4% to 89%). Adherence was not associated with FEV1 or emergency department visits. Themes emerged from interviews as follows. Teens (1) take F/S inconsistently; (2) believe F/S is "supposed to help me breathe"; (3) dislike its taste; (4) are "too busy" and "forget"; and (5) recommend "reminder" solutions to poor adherence. Twenty percent believed that taking F/S was unnecessary, and another 18% expressed ambivalence about its benefits. CONCLUSION: Adherence was poor. Examining and acknowledging health beliefs of older teens in the context of their complicated lives might facilitate discussions about self-management.

Linking numeracy and asthma-related quality of life.

OBJECTIVE: To examine the correlation of numerical skills used in patients' self-management of asthma with asthma-related quality of life (AQOL). METHODS: Adults with moderate-severe asthma completed the Asthma Numeracy Questionnaire (ANQ), assessments of reading comprehension and self-efficacy, and the mini-Asthma Quality of Life Questionnaire (miniAQLQ). The numeracy-AQOL relationship was evaluated in the context of potential confounders (demographic variables) and mediators (e.g. income and self-efficacy), using tests of correlation then multivariable models to assess for confounders and mediators. RESULTS: 80 adults with moderate or severe asthma were evaluated. Mean ANQ score was 2.3+/-1.2 (range 0-4). ANQ was correlated with miniAQLQ (rho=0.24, p=0.03). This association was sustained (rho=0.27, p=0.02) when controlling for potential confounders significantly associated with AQOL (age, Latino ethnicity). The ANQ-miniAQLQ association was mediated by household income; the correlation was reduced by 81% when adjusting for income (rho=0.05, p=0.65). In contrast, self-efficacy less strongly mediated this association; the correlation was reduced by 26% when controlled for self-efficacy (rho=0.20, p=0.08). CONCLUSION: Numerical skills needed for asthma self-management influence AQOL primarily through their impact on income and, to a lesser extent, on self-efficacy. PRACTICE IMPLICATIONS: Adults with asthma will benefit from self-management instructions employing the simplest mathematical constructs whose understanding is confirmed by clinicians.

Validation of a novel device to objectively measure adherence to long-term oxygen therapy.

RATIONALE: We have developed a novel oxygen adherence monitor that objectively measures patient use of long-term oxygen therapy. The monitor attaches to the oxygen source and detects whether or not the patient is wearing the nasal cannula. OBJECTIVE: The study's purpose was to validate the monitor's performance in patients with chronic obstructive pulmonary disease during wakefulness and sleep. METHODS: Ten adult males with stable chronic obstructive pulmonary disease (mean +/- SD FEV1 37.7 +/- 14.9% of predicted) on long-term continuous oxygen therapy were tested in a sleep laboratory over a 12-13 hour period that included an overnight polysomnogram. MEASUREMENTS: The monitor's measurements were obtained at 4-minute intervals and compared to actual oxygen use determined by review of time-synchronized video recordings. MAIN RESULTS: The monitor made 1504/1888 (79.7%) correct detections (unprocessed data) across all participants: 957/1,118 (85.6%) correct detections during wakefulness and 546/770 (70.9%) during sleep. All errors were false negatives, ie, the monitor failed to detect that the participant was actually wearing the cannula. Application of a majority-vote filter to the raw data improved overall detection accuracy to 84.9%. CONCLUSIONS: The results demonstrate the monitor's ability to objectively measure whether or not men with chronic obstructive pulmonary disease are receiving their oxygen treatment. The ability to objectively measure oxygen delivery, rather than oxygen expended, may help improve the management of patients on long-term oxygen therapy.

A novel device for measuring long-term oxygen therapy adherence: a preliminary validation.

INTRODUCTION: Current methods for measuring patient adherence to long-term oxygen therapy fail to measure the actual amount of time the patient is inhaling oxygen and the pattern of oxygen use within the day. We have developed a novel oxygen-adherence monitor to address these limitations, and this report introduces the monitor and provides preliminary data validating its use. METHODS: This battery-powered monitor attaches to the oxygen source and detects respiratory-related pressure fluctuations transmitted through the nasal cannula. The monitor takes a measurement over a 25-second period, at 4-min intervals. It detects and stores data on 4 different states that describe the patient's actual use of the oxygen source and nasal cannula: source-off/cannula-off, source-off/cannula-on, source-on/cannula-off, and source-on/cannula-on. We studied the monitor's performance with 10 patients with chronic obstructive pulmonary disease, during a directly-observed sequence of using and not using supplemental oxygen via nasal cannula, while sitting and walking. RESULTS: The monitor correctly detected 122 out of 129 measurements among all participants, yielding a 95\% detection accuracy. CONCLUSION: A monitor that objectively measures oxygen inhalation, rather than oxygen expenditure, may help improve the management of patients on long-term oxygen therapy.

Adherence logger for a dry powder inhaler: a new device for medical adherence research.

BACKGROUND: Adherence to inhaled steroid regimens is frequently poor. Finding ways to improve adherence depends on the ability to measure time and date of inhaler use reliably and to detect deliberate dose dumping. There is no such monitor for the popular new dry powder inhalers. OBJECTIVE: To develop and test an electronic monitor for a dry powder inhaler that will provide information on the time and date of use. METHODS: An electronic adherence monitor for the Advair Diskus dry powder inhaler was developed and tested. In this device, inhaler use is determined by detecting and recording the motion of the drug delivery lever in the inhaler with a magnetic sensor. An additional electronic interface and software were also developed to allow the adherence data to be uploaded to a computer for display and analysis. RESULTS: System and reliability tests involving multiple-day and repeated-use tests of the adherence monitor demonstrate the overall performance and reliability of the device, and specifically its ability to record the time and date of dose delivery. In the repeated-use test, 300 successive actuations of the dose delivery lever were correctly sensed and recorded without error. CONCLUSION: The simple-to-use, low-cost, reusable adherence monitor accurately records time and date of inhaler use and thus allows clinical monitoring and adherence studies in patients using the Advair Diskus dry powder inhaler. The same technology should be adaptable to other dry powder inhalers, including the Pulmicort Tubuhaler and the Symbicort Tubuhaler.