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SEER Training Modules

Follow-up Calculations

I. Follow-up rate for all patients (living and dead):
Criteria Calculation Number Percent
Total cases in registry since reference date   ________  
1. less "benign" and "borderline" cases
(behavior codes 0, 1)
(-) ________  
2. less carcinoma in situ cervix cases (-) ________  
3. less cases of in situ and localized basal and squamous cell carcinoma of skin (-) ________  
4. less foreign residents (-) ________  
5. less nonanalytic (-) ________  
Subtotal cases = All analytic cases since reference date (class of case 0, 1, 2) (A) ________ 100%
less number dead (or are 100 years old or older) (B)- ________ ________
Subtotal cases (number living) (C) ________ ________
less number current (known to be alive in the last 15 months) (D)- ________ ________
Total (Lost to Follow-Up or Not Current) (E) ________ ________
Follow-Up Rate     _______*

Note:

Line A minus Line B equals Line C;
Line D plus Line E also equals Line C:
Line B plus Line D Plus Line E equals Line A.
or: A - B = C; D + E = C; B + D + E = A

To calculate percentages, divide lines B, C, D, and E by line A.

* An 80 percent follow-up rate is maintained for all analytic patients from the cancer registry reference date.

II. Follow-up rate for analytic patients diagnosed within the last five years or from the cancer registry reference date, whichever is shorter.
Number Percent
Total cases in registry from the last five years or since reference date, whichever is shorter   ________  
1. less "benign" and "borderline" cases in last five years (behavior codes 0, 1 ) (-) ________  
2. less carcinoma in situ cervix cases (-) ________  
3. less cases of in situ and localized basal and squamous cell carcinoma of skin (-) ________  
4. less cases of in situ and localized basal and squamous cell carcinoma of skin (-) ________  
5. less nonanalytic (-) ________  
Subtotal cases = All analytic cases in last five years or since reference date whichever is shorter (A) ________ 100%
Less number dead (or are 100 years or older) (B)- ________  
Subtotal cases (number living) (C) ________ ________
less number current (known to be alive in the last 15 months) (D) ________ ________
Total (Lost to Follow-Up or Not Current) (E) ________ ________
Follow-Up Rate     ______**

Note:

Line A minus Line B equals Line C;
Line D plus Line E also equals Line C:
Line B plus Line D plus Line E equals Line A:
or: A-B=C; D+E=C;B+D+E=A

To calculate percentages, divide lines B, C, D, and E by line A.

** A 90 percent follow-up rate is maintained for all analytic patients diagnosed within the last five years or from the cancer registry reference date, whichever is shorter.