Population attibutable fraction

Kyra — Mon, 10 Dec 2018 19:18:36 GMT

Hi,

I am trying to calculate the Population attibutable fraction ( outcome is head and neck cancer and exposure is occupation). Is there any way i can adjust for tobacco and alcohol too while calculating that?

I am pasting my code and the output below.

Neverexposed 0 means they were exposed to the risk factor occupation.

Event_E is event in exposed( to occupation)

Count_E is number of exposed

Event_NE is event in not exposed

Count_NE is number of non-exposed

Thanks,

data red.arp;
   input Event_E Count_E Event_NE Count_NE;
   datalines;
   6029 13218 2810 9315
;

ods graphics on;
proc stdrate data=red.arp
             refdata=red.arp
             method=indirect(af)
             stat=risk
             plots(stratum=horizontal)
             ;
   population event=Event_E total=Count_E;
   reference event=Event_NE total=Count_NE;

run;
ods graphics off;

frequency table just for your reference. Neverexposed 0 means they were exposed.

The FREQ Procedure

FrequencyPercentRow PctCol Pct

Table of neverexposed by caseneverexposed case(Status)1 2 Total01Total

6029

26.71

45.61

68.21

7189

31.85

54.39

52.36

13218

58.57

2810

12.45

30.05

31.79

6541

28.98

69.95

47.64

9351

41.43

8839

39.16

13730

60.84

22569

100.00

The SAS System

The STDRATE Procedure

Standardization InformationData SetReference Data SetMethodStatisticNumber of Strata

RED.ARP

Indirect Standardization

Risk

The SAS System

The STDRATE Procedure

Standardized Morbidity/Mortality RatioObservedEvents ExpectedEvents SMR StandardError 95% Normal ConfidenceLimits Z Pr > |Z|

6029

3987.39

1.5120

0.0144

1.4839

1.5402

35.65

<.0001

Indirectly Standardized Risk EstimatesStudy Population ReferenceCrudeRisk ExpectedEvents SMR Standardized RiskObservedEvents Number ofObservations CrudeRisk Estimate StandardError 95% Normal ConfidenceLimits

6029

13218

0.4561

0.3017

3987.39

1.5120

0.4561

0.00433

0.4476

0.4646

Attributable Fraction EstimatesParameter Estimate 95% Confidence LimitsAttributable RiskPopulation Attributable Risk

0.33863	0.32609	0.35072
0.23098	0.21620	0.24547

Re: Population attibutable fraction

Kyra — Tue, 11 Dec 2018 16:48:35 GMT

I think the answer to my question is the formula : 1-1/Adjusted OR.

topic Population attibutable fraction in SAS Procedures

Population attibutable fraction

Re: Population attibutable fraction