Cross-comparisons of reports on the prevalence of transsexualism:
by Lynn Conway [Update of 2-04-07]
     
Table 1: Tabulation of reported results in the form "1 : N"  
Reference nat note doc LB P(TSImf) P(TSAmf) P(SHAmf) P(SHAfm) P(HTAmf) P(HTAfm) P(SRSImf) P(SRSAmf) P(SRSAfm) I(SHAmf) I(SHAfm) I(HTAmf) I(HTAfm) I(SRSAmf) I(SRSAfm)
walinder68 SW  [1] X Y     1:37,000 1:103,000                      
walinder71 SW  [2] X Y                       1:500,000 1:500,000    
hoenig74 UK  [3] X Y     1:34,000 1:108,000                      
ross81 AU  [4] X N                   1:48,000 1:300,000        
eklund88 '80 NL  [5] X Y         1:45,000 1:200,000                   
     "   " ('83) "   " "         1:26,000 1:100,000                  
     "   " ('86) "   " "         1:18,000 1:54,000                  
tsoi88 SI  [6] X Y > 1:2,000            1:2,000 1:2,900 1:8,300            
bakker93 NL  [7] X N         1:11,900 1:30,400                  
landen96b SW  [8] X N                       1:710,000 1:710,000    
vankesteren96 NL  [9] X N         1:11,900 1:30,400   1:17,500 1:41,000            
weitzel96 DE                                    
wilson99 SC  [10] X N     1:7,700 1:31,000 1:12,800 1:52,000   1:22,000 1:78,000            
conway01 US  [11]   Y > 1:500             > 1:2,500 na            
kelly01 UK  [12]   Y               > 1:3,700 ?            
winter02 TH  [13] X Y  > 1:670                          
olsson03 SW  [14] X N                           1:500,000 1:625,000
decuypere06 BE  [15] X N             1:4,500 1:12,900 1:33,800            
winter06 TH  [16] X Y  1:200  1:270          1:400  1:600              
Notes:    
Reported results, or their equivalent "1 : N" values, are in standard font.  
Results have been normalized for commensurability by placement in appropriate columns.
Results from original reports are shown in non-italics. Results that have been derived from data in the original reports are shown in italics.
nat = nationality of study;  note = link comment cell;  doc = link to analysis.doc;  LBs = yes/no re whether report recognizes results are lower bounds.
See the following report for definitions, notations and calculation methods: 
"On the Calculation of the Prevalence of Transsexualism", by Femke Olyslager and Lynn Conway, 2007 (in preparation).
Table 2: Tabulation of reported results in the form of "n", the number per 100,000
Reference Nat. note Rev. LB P(TSImf) P(TSAmf) P(SHAmf) P(SHAfm) P(HTAmf) P(HTAfm) P(SRSImf) P(SRSAmf) P(SRSAfm) I(SHAmf) I(SHAfm) I(HTAmf) I(HTAfm) I(SRSAmf) I(SRSAfm)
walinder68 SW  [17] X Y     2.7 0.97                      
walinder71 SW  [18] X Y                       0.2 0.2    
hoenig74 UK  [19] X Y     2.9 0.93                      
ross81 AU  [20] X N                   2.1 0.3        
eklund88 '80 NL  [21] X Y         2.2 0.5                  
     "   " ('83) "   " "         3.8 1.0                  
     "   " ('86) "   " "         5.6 1.9                  
tsoi88 SI  [22] X Y > 50           50 35 12            
bakker93 NL  [23] X N         8.4 3.3                  
landen96b SW  [24] X N                       0.14 0.14    
vankesteren96 NL  [25] X N         8.4 3.3   5.7 2.4            
weitzel96 DE                                    
wilson99 SC  [26] X N     13 3.2 7.8 1.9   4.5 1.3            
conway01 US  [27]   Y > 200               > 40 na            
Kelly01 UK  [28]   Y               > 27 ?            
Winter02 TH  [29] X Y   > 150                          
olsson03 SW  [30] X N                           0.2 0.16
decuypere06 BE  [31] X N             22 7.8 3.0            
winter06 TH  [32] X Y 500 370         250 170              
Notes:
Reported numbers, or their equivalent "n : 100,000" values, are in standard font.
Results have been normalized for commensurability by placement in appropriate columns.
Results from original reports are shown in non-italics. Results that have been derived from data in the original reports are shown in italics.
nat = nationality of study;  note = link comment cell;  doc = link to analysis.doc;  LBs = yes/no re whether report recognizes results are lower bounds.
Other references:
akesson69 SW  [33]
godlewski88 PO  [34]
gooren89com NL  [35]
decuypere95 BE  [36]
landen96a SW  [37]
cohkettenis99 NL  [38]
garrels00 DE  [39]
decuypere01 BE  [40]
tsjoen06 BE  [41]
Page links:
http://ai.eecs.umich.edu/people/conway/TS/Prevalence/REFs/REFs.xls
http://ai.eecs.umich.edu/people/conway/TS/Prevalence/REFs/REFs.htm
[1]
This is the classic first systematic study on TS prevalence.

Counted numbers of fm and mf approaching psychiatrists in Sweden for sex reassignment up to 1968 to get a lower bound on prevalence.

Defined transsexualism as those seeking SRS.

Set pattern for many later studies.

Indicated that prevalent esitimates are difficult (i.e., are lower bounds due to underreporting).
[2]