Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
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Question: Question: Does in a safety net population HPV4 vaccine adherence worsen as BMI increases?
Answer: Obesity, as well as gravidity and Hispanic race, are risk factors for lack of HPV4 vaccine adherence among young females in a safety net population.

Answer: yes


Question: Question: Does greater body mass independently predict less radiographic progression on X-ray and MRI over 1-2 years?
Answer: Greater BMI is associated with a lower risk of progression on X-ray and MRI over 2 years. Subjects with greater BMI also demonstrate less bone oedema at baseline. Greater BMI may indicate a less aggressive RA phenotype and aid in risk stratification.

Answer: yes


Question: Question: Are nicotine effects on retrieval-induced forgetting attributable to changes in arousal?
Answer: To test an arousal explanation of nicotine's effects on cognitive inhibition, this study compared the separate and combined effects of an acute dose of nicotine and an arousal manipulation on inhibitory processes associated with the retrieval-induced forgetting (RIF) paradigm.

Answer:
no