proc format  ;
   value sector /* any time in various sectors */
    1 ='xMainstream'    2 =  'Independent' 3='Special' 4='Behavioural';
value drgcode 
	 0='none' 
	1='only cannabis' 
	2='only glue' 
	3='other drug or comb'
;
  value sm /* SF  Frequency of smoking (whole cigs only)  */
      4 = 'Daily'
      3 = 'Weekly'
      2 = ' Less than weekly'
      1 = 'Hardly ever'
      0 = 'Non-smoker'
      ;
value alc /* RF  Frequency of drinking alcohol (whole drinks only)  */
      5 = 'Few times/wk'  
      4 = ' Weekly'  
      3 = 'Monthly'  
      2 = 'Special occasions'  
      1 ='hardly ever'  
      0= 'Non-drinker'  
   ;
      value gender /* Gender */
      1 = 'Male'
      2 = 'Female' ;
   value ethgp /* White or non-white (missing data included based on name) */
      1 = 'non-white'
      2 = 'white' ;
   value saagegp /* SA Age of respondent, grouped */
      1 = 'Younger than 11 & 8 months'
      2 = 'Older than 12 & 5 months'
      3 = 'Between age 11y8m and 12y5m' ;
   value hzrespre /* HZ. Whether had a hearing record at any of the seven sweeps */
      1 = 'yes'
      2 = 'no' ;
   value szindep /* SZ. Individual deprivation/socio-economic status indicator */
      0 = 'Manual/high deprivation'
      1 = 'Non-manual/low deprivation' ;
   value yesno /* SZ. Whether school record for truancy at all from S1 to S4 */
      1 = 'yes'
      2 = 'no' ;

   value yzleave /* YZ.  Whether left school at earliest opportunity or not */
      1 = 'Leaver at end S4'
      2 = 'Still attending in S5' ;
value times 
       0='never'
       1= '1 time'
      2 = '2 times'
      3 = '3 times'
      4 = '4 times'
      5 = '5 times'
      6 = '6 to 10 times'
      11 = 'More than 10 times';
	  run;