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We examine the reliability of the base studies used in an air quality/heart attack meta-analysis and the resulting meta-analysis.\n  Methods A meta-analysis study that includes 14 observational air quality/heart attack studies is examined for its statistical reliability. We use simple counting to evaluate the reliability of the base papers and a p-value plot of the p-values from the ba"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1902.00770","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-02-02T19:09:44Z","cross_cats_sorted":[],"title_canon_sha256":"434b29da4a49ccaeb3489aafdc188ad3935fe418c5c99e36efc87bfa88b7bf77","abstract_canon_sha256":"4fed91268caf8745413947ed8ab8feb44831f7831b4fc7cca0607241717f7551"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:52.215982Z","signature_b64":"X03CXgKxQGfTolZQNAIQ83c9WyxnqOyvJo7dTFjMTwriKGdwvTQTYcD5Z7Sjo/+TmlyQz8JZYlktWufHmW32Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cbcfb0462ffe93a6440fb9cb2e28ace0b37ece09aa6f08b1faa679acc93e7ac","last_reissued_at":"2026-05-17T23:54:52.215459Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:52.215459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The reliability of an environmental epidemiology meta-analysis, a case study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.AP","authors_text":"Kumer Das, Mithun Kumar Acharjee, S. 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