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Figure 1: Modeled pittsburgh sleep quality index versus distance to nearest IWT (mean and 95% confidence limits) regression equation: PSQI = ln (distance) + sex + age + site [controlled for household clustering]. Ln (distance) P value = 0.0198 (reproduced from original paper for clarity)

Figure 1: Modeled pittsburgh sleep quality index versus distance to nearest IWT (mean and 95% confidence limits) regression equation: PSQI = ln (distance) + sex + age + site [controlled for household clustering]. Ln (distance) <i>P</i> value = 0.0198 (reproduced from original paper for clarity)