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# In 1987 sinusitis was the most common chronic medical

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In 1987 sinusitis was the most common chronic medical [#permalink]

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24 Aug 2012, 08:26
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In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.
The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages.
The average age of the United States population will increase between 1987 and 2000.
Which of the following conclusions can be most properly drawn about chronic medical conditions in the United States from the information given above?
(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
(B) Arthritis will be the most common chronic medical condition in 2000.
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.
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Re: In 1987 sinusitis was most common chronic medical condition [#permalink]

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24 Aug 2012, 09:54
C is correct.

(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000. >> Can't say this from given info

(B) Arthritis will be the most common chronic medical condition in 2000. >> Can't say this from given info

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000. >> Note that passage says, average age of population will increase between 1987 - 2000. Passage also says that rate for sinusitis is the same for people of all ages. Additing these two data pointers, we can conclude C

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. >> Can't say this from given info

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. >> Too general.
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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28 Jun 2014, 02:45
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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23 Feb 2015, 21:49
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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23 Jul 2015, 19:09
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In 1987 sinusitis was the most common chronic medical [#permalink]

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26 Sep 2015, 13:55
not enough reason to choose C
the incidence rate is same for sinoc at all ages
It DOES NOT mean it avg age of people suff from sinoc WILL INCREASE !
lets check, 100 people of different ages, all have same probability to catch sinoc (it does not mean ALL OF THEM will get sinoc for sure). What if only one person aged 20 yrs is infected with sinoc and others are okay ? Will it SURELY INCREASE the avg age of people attacked with sinoc (option C) ???
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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28 Sep 2015, 01:41
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Expert's post
oishik wrote:
not enough reason to choose C
the incidence rate is same for sinoc at all ages
It DOES NOT mean it avg age of people suff from sinoc WILL INCREASE !
lets check, 100 people of different ages, all have same probability to catch sinoc (it does not mean ALL OF THEM will get sinoc for sure). What if only one person aged 20 yrs is infected with sinoc and others are okay ? Will it SURELY INCREASE the avg age of people attacked with sinoc (option C) ???

"the incidence rate for sinusitis is the same for people of all ages." implies that the % of people who get it will be the same in all age ranges.
So if 1% of 20 yr olds get it, only 1% of 30 year olds will get it and only 1% of 3 yr olds will get it. So people who get sinusitis are a small but proportionate sample of the entire population. Since the representation of each age group is the same as in the actual population,

Average age of people with sinusitis = Average age of the population.

If average age of the population goes up, the average age of people with sinusitis will go up.
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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19 Feb 2016, 09:39

A) Sinusitis will be more common than either arthritis or high blood pressure in 2000. >> Can't say this from given info

(B) Arthritis will be the most common chronic medical condition in 2000. >> Can't say this from given info

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000. >> Note that passage says, average age of population will increase between 1987 - 2000. Passage also says that rate for sinusitis is the same for people of all ages. Additing these two data pointers, we can conclude C

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. >> Can't say this from given info

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. >> Too general
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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03 Apr 2016, 00:09
Hi

Why cannot A be the answer?

My explanation for A:
The passage says The incidence rates for both arthritis and high blood pressure increase with age.....The average age of the United States population will increase between 1987 and 2000.
if the average age is expected to increase and we know that incidence rate for arthritis and high BP increase with age, we can say that incident rate for these two problems has reduced => Sinusitis will be more common.
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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03 Apr 2016, 12:14
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sa18 wrote:
Hi

Why cannot A be the answer?

My explanation for A:
The passage says The incidence rates for both arthritis and high blood pressure increase with age.....The average age of the United States population will increase between 1987 and 2000.
if the average age is expected to increase and we know that incidence rate for arthritis and high BP increase with age, we can say that incident rate for these two problems has reduced => Sinusitis will be more common.

Check the question stem once again -

Quote:
In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.

1. Sinusitis {Remains same with age }
2. Arthritis {Increases with age}
3. Blood Sugar {Increases with age}

Further it is given

Quote:
The average age of the United States population will increase between 1987 and 2000.

Consider simple numbers for the same

Let there be 2 people , age of the 2 people be 10 and 30

Average age of the 2 people in year 1 is = 20

Now consider their age after 10 years (considering there is no change in population ) , total age of the 2 people be 20 and 40

Average age of the 2 people in year 2 { after 10 years } is = 30

Since the probability of a person suffering from Sinusitis remains same irrespective of age , thus it will be same and it increases from 20 years in year 1 to 40 years in year 2

Further it is given that -
Quote:
The incidence rates for both arthritis and high blood pressure increase with age

Suppose the incidence rates for both arthritis and high blood pressure be 10% of the entire population in year 1 ,
According to the problem the incidence rates for both arthritis and high blood pressure will be 15% of the entire population in year 2

The above 2 statement simply demonstrates the increase in rate in incidence rates for both arthritis and high blood pressure with age and you can not simply claim that Sinusitis is more common than arthritis and high blood pressure
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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04 Apr 2016, 08:55
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Thanks a lot for the step by step explanation
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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09 Jul 2016, 17:17
VeritasPrepKarishma wrote:
ajit257 wrote:
In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.
The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages.
The average age of the United States population will increase between 1987 and 2000.

Which of the following conclusions can be most properly drawn about chronic medical conditions in the United States from the information given above?
(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
(B) Arthritis will be the most common chronic medical condition in 2000.
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.

I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks.

One important point you need to understand to understand this question is the increase in average age of a population.
Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today)
So when we say average life increased, it is probably because there are more aged people.

Premises:
- In 1987 sinusitis most common chronic condition followed by arthritis and high blood pressure
- More arthritis and high blood pressure with age
- Incidence of sinusitis is the same for people of all ages
- Average age will increase between 1987 and 2000.

Let's refresh what we said about conclusion questions - should be implied from the argument and should give no new data.

(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
With increase in average age, we cannot say this. It is possible that other two become more common.

(B) Arthritis will be the most common chronic medical condition in 2000.
Definitely no reason to pick Arthritis out of the two - BP and Arthritis so no need to even think about it.

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
Since incidence of sinusitis is the same for all ages, we can conclude that the average age of a person suffering from Sinusitis is the same as the average age of the population. Since average age of population will increase, average age of people suffering from Sinusitis will also increase.

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
Sinusitis does not depend on age so cannot be concluded.

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.
No reason to conclude this.

could someone explain why its not B? The premise says that arthritis is the 2nd most common overall. Arthritis becomes more common as age increases. So if the avg age of population will increase, won't arthritis increase bc it will happen more often?

so if 60% of 60 year old have it now, 70% of 70 year olds and 80% of 80 year olds, if there will be more 80 year olds, doesn't that mean the % will go up because it skews to the higher end?
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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11 Jul 2016, 22:38
nycgirl212 wrote:
VeritasPrepKarishma wrote:
ajit257 wrote:
In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.
The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages.
The average age of the United States population will increase between 1987 and 2000.

Which of the following conclusions can be most properly drawn about chronic medical conditions in the United States from the information given above?
(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
(B) Arthritis will be the most common chronic medical condition in 2000.
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.

I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks.

One important point you need to understand to understand this question is the increase in average age of a population.
Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today)
So when we say average life increased, it is probably because there are more aged people.

Premises:
- In 1987 sinusitis most common chronic condition followed by arthritis and high blood pressure
- More arthritis and high blood pressure with age
- Incidence of sinusitis is the same for people of all ages
- Average age will increase between 1987 and 2000.

Let's refresh what we said about conclusion questions - should be implied from the argument and should give no new data.

(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
With increase in average age, we cannot say this. It is possible that other two become more common.

(B) Arthritis will be the most common chronic medical condition in 2000.
Definitely no reason to pick Arthritis out of the two - BP and Arthritis so no need to even think about it.

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
Since incidence of sinusitis is the same for all ages, we can conclude that the average age of a person suffering from Sinusitis is the same as the average age of the population. Since average age of population will increase, average age of people suffering from Sinusitis will also increase.

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
Sinusitis does not depend on age so cannot be concluded.

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.
No reason to conclude this.

could someone explain why its not B? The premise says that arthritis is the 2nd most common overall. Arthritis becomes more common as age increases. So if the avg age of population will increase, won't arthritis increase bc it will happen more often?

so if 60% of 60 year old have it now, 70% of 70 year olds and 80% of 80 year olds, if there will be more 80 year olds, doesn't that mean the % will go up because it skews to the higher end?

In ranking:
Sinusitis
Arthritis
High BP

Incidences of both, Arthritis and high BP increase with age. What if high BP incidence increases much more with age?

For arthritis: 60% of 60 year old have it now, 70% of 70 year olds and 80% of 80 year olds
For high BP: 50% of 60 year old have it now, 75% of 70 year olds and 95% of 80 year olds

We don't know the rate at which the incidence increases in the two diseases. So option (B) is not NECESSARILY true.
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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09 Mar 2017, 21:28
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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26 Jun 2017, 09:49
Merged topics. Please, search before posting questions!
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In 1987 sinusitis was the most common chronic medical [#permalink]

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28 Jun 2017, 17:09
Here's my take on this question, please let me know if I am wrong.

In short, we could extract some information from the question.
1. Sinusitis is an chronicle disease followed by HBP and Arthritis.
2. The incidence rate of HBP and Arthritis will increase as patient gets order.
3. The incidence rate for Sinusitis remain the same.
4. The average age will increase between 1987 and 2000.

Question stem:
Which of the following conclusions can be most properly drawn about chronic medical conditions in the United States from the information given above?

(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
-Wrong, the passage did not mention this.

(B) Arthritis will be the most common chronic medical condition in 2000.
-Wrong, same as choice A

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
-Yes, it matches the information that we extract from the question.

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
-Wrong, same reason as A and B

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.
-Wrong, same reason as A, B and D
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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12 Nov 2017, 19:07
In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order. The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages. The average age of the United States population will increase between 1987 and 2000.

Which of the following conclusions can be most properly drawn about chronic medical conditions in the United States from the information given above?

A. Sinusitis will be more common than either arthritis or high blood pressure in 2000. - Incorrect - Both arthritis and high blood pressure may surpass sinusitis in 2000

B. Arthritis will be the most common chronic medical condition in 2000. - Incorrect - can't infer

C. The average age of people suffering from sinusitis will increase between 1987 and 2000. - Correct - since average age will increase and incidence rate for sinusitis is same for all ages

D. Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987 - Incorrect

E. A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. - Incorrect - the argument provides no evidence for this

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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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14 Nov 2017, 09:52
Could anyone please explain to me why option D is incorrect? My reasoning was that since the rate of sinusitis is the same for people of all ages and the incidence rates for both arthritis and high blood pressure increase with age, there will now be fewer people suffering from sinusitis. If the average age is increasing between 1987 to 2000 and the rate of A and HBP is also increasing with age, shouldn't there be fewer people with sinusitis now? Please help me and tell me where I am going wrong in my reasoning! Would immensely appreciate it!
Re: In 1987 sinusitis was the most common chronic medical   [#permalink] 14 Nov 2017, 09:52

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