text: --1308	Number of visit detail records outside valid observation period
  
  SELECT 
  	1308 AS analysis_id,
  	CAST(NULL AS VARCHAR(255)) AS stratum_1,
  	CAST(NULL AS VARCHAR(255)) AS stratum_2,
  	CAST(NULL AS VARCHAR(255)) AS stratum_3,
  	CAST(NULL AS VARCHAR(255)) AS stratum_4,
  	CAST(NULL AS VARCHAR(255)) AS stratum_5,
  	COUNT_BIG(vd.person_id) AS count_value
  INTO 
  	@scratchDatabaseSchema@schemaDelim@tempAchillesPrefix_1308
  FROM 
  	@cdmDatabaseSchema.visit_detail vd
  LEFT JOIN 
  	@cdmDatabaseSchema.observation_period op
  ON 
  	op.person_id = vd.person_id
  AND 
  	vd.visit_detail_start_date >= op.observation_period_start_date
  AND 
  	vd.visit_detail_start_date <= op.observation_period_end_date
  WHERE 
  	op.person_id IS NULL;
  