Linear Estimates of the Impact of the Solar Suitcase Intervention in Maternal Health Care Facilities in Uganda on Objective Measures of Light Using Sensor Dataa

OutcomeAverage Before InterventionAverage After InterventionDifference (95% CI)
Minutes of light per 24 hours856997141.0 (7.6, 274.3)
Level of brightness during daytime (7:00 am to 6:00 pm)47.954.26.3 (−2.2, 14.8)
Level of brightness during nighttime (6:00 pm to 7:00 am)14.524.710.1 (0.71, 19.6)
  • Abbreviation: 95% CI, 95% confidence interval.

  • a Results show point estimates and 95% confidence intervals. Standard errors are clustered at the facility level. Regression controls for month of year and facility fixed effects. One facility (in Sequence 2) had a broken sensor and was not included. The number of minutes of light per day is calculated as the number of minutes over a threshold of 20% of the maximum seen in that facility. Results robust to using any threshold between 1% and 35% (results not shown). Level of brightness is on a 0–100 scale, as the percentage of the maximum light the sensor in each facility could read.