**Assets:** Assets are measured in $1000s of current USD.

**Attendance rates:** Attendance rates are for school attendance and given in percentage points.

**Birthweight:** Weight at birth, in kg.

**Chest pain:** The relative risk of answering “yes” to whether the person experienced chest pain, often a symptom of respiratory illness in the context of cookstoves. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the symptom. Risks above 1 mean the treatment increased the symptom; risks below 1 mean the treatment decreased the symptom. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the symptom than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the symptom. Read more on the difference between risks and rates.

**Consumption:** Consumption is measured in $1000s of current USD.

**Cough:** The relative risk of answering “yes” to whether the person experienced coughing, often a symptom of respiratory illness in the context of cookstoves. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the symptom. Risks above 1 mean the treatment increased the symptom; risks below 1 mean the treatment decreased the symptom. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the symptom than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the symptom. Read more on the difference between risks and rates.

**Diarrhea incidence:** The rate ratio of new incidents of diarrhea. The rate ratio is the ratio of the incidence rates in the treatment and control group. Ratios above 1 mean the treatment increased the incidence rate; ratios below 1 mean the treatment decreased the incidence rate. For example, a rate ratio of 3 would imply that the incidence rate was 3 times higher in the treatment group than in the control group. Read more on the difference between incidence and prevalence. Read more on the difference between risks and rates.

**Diarrhea prevalence:** The prevalence ratio of the population with diarrhea. The prevalence is the proportion of the population experiencing the symptom. Ratios above 1 mean the treatment increased the incidence rate; ratios below 1 mean the treatment decreased the incidence rate. For example, a prevalence ratio of 3 would imply that the prevalence was 3 times higher in the treatment group than in the control group. Read more on the difference between incidence and prevalence. Read more on the difference between risks and rates.

**Difficulty breathing:** The relative risk of answering “yes” to whether the person experienced difficulty breathing, often a symptom of respiratory illness in the context of cookstoves. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the symptom. Risks above 1 mean the treatment increased the symptom; risks below 1 mean the treatment decreased the symptom. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the symptom than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the symptom. Read more on the difference between risks and rates.

**Dysentery:** The rate ratio of new incidents of dysentery. The rate ratio is the ratio of the incidence rates in the treatment and control group. Ratios above 1 mean the treatment increased the incidence rate; ratios below 1 mean the treatment decreased the incidence rate. For example, a rate ratio of 3 would imply that the incidence rate was 3 times higher in the treatment group than in the control group. Read more on the difference between incidence and prevalence. Read more on the difference between risks and rates.

**Enrollment rates:** Enrollment rates are for school enrollment and given in percentage points.

Excessive nasal secretion: The relative risk of answering “yes” to whether the person experienced excessive nasal secretions (mucus), often a symptom of respiratory illness in the context of cookstoves. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the symptom. Risks above 1 mean the treatment increased the symptom; risks below 1 mean the treatment decreased the symptom. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the symptom than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the symptom. Read more on the difference between risks and rates.

**Height:** Height is measured in cm.

**Height-for-age:** Height-for-age is measured in z-scores. The z-score gives the number of standard deviations that height-for-age falls away from the expected reference point. Z-scores are often used to define undernutrition. The World Health Organization gives a good overview of its clinical use.

**Hemoglobin:** Hemoglobin is measured in terms of g/dL.

**Labor force participation:** Labor force participation provides the probability that someone works.

**Labor hours:** Labor hours represents the number of hours someone works and is measured in hours.

**Malaria:** The relative risk of developing malaria. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the outcome. Risks above 1 mean the treatment increased the outcome; risks below 1 mean the treatment decreased the outcome. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the outcome than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the outcome. Read more on the difference between risks and rates.

**Malformations:** The relative risk of a child being born with malformations. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the outcome. Risks above 1 mean the treatment increased the outcome; risks below 1 mean the treatment decreased the outcome. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the outcome than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the outcome. Read more on the difference between risks and rates.

**Mid-upper arm circumference:** Mid-upper arm circumference is a common indicator of undernutrition and is measured in cm.

**Neonatal deaths:** The relative risk of neonatal deaths (death of a child up to 28 days after birth). The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the outcome. Risks above 1 mean the treatment increased the outcome; risks below 1 mean the treatment decreased the outcome. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the outcome than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the outcome. Read more on the difference between risks and rates.

**Pregnancy:** Pregnancy represents the probability of becoming pregnant during the study and is measured in percentage points.

**Probability of opening business:** The probability of opening a business is measured in percentage points.

**Profits:** Profits are measured in $1000s of current USD.

**Retention rates:** Retention rates measure the probability of being held back a year at school and is measured in percentage points.

**Savings:** Savings are measured in $1000s of current USD.

**Skilled attendant at delivery:** Skilled attendant at delivery represents the probability that a pregnant woman will have a skilled attendant at the delivery of her child.

**Stillbirths:** The relative risk of a child being stillborn. The relative risk is a ratio of the probability of the event occurring in the treatment group to the probability of the event occurring in the control group. A higher relative risk means a higher risk of experiencing the outcome. Risks above 1 mean the treatment increased the outcome; risks below 1 mean the treatment decreased the outcome. For example, if the relative risk is 0.5, that means the treatment group is 50% less likely to experience the outcome than the control group; if the relative risk is 2, that means the treatment group is twice as likely to experience the outcome. Read more on the difference between risks and rates.

**Test scores:** Test scores are measured in terms of standard deviations. This is important as tests can be on different scales (e.g. a test can be out of 100 or out of 10). While standard deviations are still not perfectly comparable across tests, they are the best measure one can use.

**Unpaid work:** Unpaid work represents the probability of doing unpaid work.

**Weight:** Weight is in kg.

**Weight-for-age:** Weight-for-age is measured in z-scores. The z-score gives the number of standard deviations that weight-for-age falls away from the expected reference point. Z-scores are often used to define undernutrition. The World Health Organization gives a good overview of its clinical use.

**Weight-for-height:** Weight-for-height is measured in z-scores. The z-score gives the number of standard deviations that weight-for-height falls away from the expected reference point. Z-scores are often used to define undernutrition. The World Health Organization gives a good overview of its clinical use.

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The difference between incidence and prevalence.

Incidence measures the rate of occurrence of new cases of a disease or symptom; prevalence measures the proportion of the population experiencing the disease or symptom.

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The difference between risks and rates.

Risks are measured in terms of proportions of people, e.g. number of people with a disease out of the overall population; rates are measured in events per person-time, e.g. cases per 1000 person-years.