library/classes/rulesets/Cqm/reports/NFQ_0028b/Denominator.php

   1 <?php
   2 // Copyright (C) 2011 Brady Miller <brady.g.miller@gmail.com>
   3 //
   4 // This program is free software; you can redistribute it and/or
   5 // modify it under the terms of the GNU General Public License
   6 // as published by the Free Software Foundation; either version 2
   7 // of the License, or (at your option) any later version.
   8 //
   9 class NFQ_0028b_Denominator implements CqmFilterIF
  10 {
  11     public function getTitle()
  12     {
  13         return "NFQ 0028b Denominator";
  14     }
  15
  16     public function test( CqmPatient $patient, $beginDate, $endDate )
  17     {
  18         // See if user has been a tobacco user before or simultaneosly to the encounter within two years (24 months)
  19         $date_array = array();
  20         foreach ( $this->getApplicableEncounters() as $encType )
  21         {
  22             $dates = Helper::fetchEncounterDates( $encType, $patient, $beginDate, $endDate );
  23             $date_array = array_merge($date_array,$dates);
  24         }
  25
  26         // sort array to get the most recent encounter first
  27         $date_array = array_unique($date_array);
  28         rsort($date_array);
  29
  30         // go through each unique date from most recent
  31         foreach ( $date_array as $date )
  32         {
  33             // encounters time stamp is always 00:00:00, so change it to 23:59:59 or 00:00:00 as applicable
  34             $date = date( 'Y-m-d 23:59:59', strtotime( $date ));
  35             $beginMinus24Months = strtotime( '-24 month' , strtotime ( $date ) );
  36             $beginMinus24Months = date( 'Y-m-d 00:00:00' , $beginMinus24Months );
  37             // this is basically a check to see if the patient is an reported as an active smoker on their last encounter
  38             if ( Helper::check( ClinicalType::CHARACTERISTIC, Characteristic::TOBACCO_USER, $patient, $beginMinus24Months, $date ) ) {
  39                 return true;
  40             }
  41             else if ( Helper::check( ClinicalType::CHARACTERISTIC, Characteristic::TOBACCO_NON_USER, $patient, $beginMinus24Months, $date ) ) {
  42                 return false;
  43             }
  44             else {
  45                 // nothing reported during this date period, so move on to next encounter
  46             }
  47         }
  48
  49         return false;
  50     }
  51
  52     private function getApplicableEncounters()
  53     {
  54         return array(
  55             Encounter::ENC_OFF_VIS,
  56             Encounter::ENC_HEA_AND_BEH,
  57             Encounter::ENC_OCC_THER,
  58             Encounter::ENC_PSYCH_AND_PSYCH,
  59             Encounter::ENC_PRE_MED_SER_18_OLDER,
  60             Encounter::ENC_PRE_IND_COUNSEL,
  61             Encounter::ENC_PRE_MED_GROUP_COUNSEL,
  62             Encounter::ENC_PRE_MED_OTHER_SERV );
  63     }
  64 }