Oral Health Topics in NHANES 2009-2010

In this post, we discuss some results related to oral health questionnaire for the most recent national data source NHANES 2009-2010. The oral health question were asked to those sampled subjects who are 30+ years old by the trained dentists. The reference page is http://www.cdc.gov/nchs/nhanes/nhanes2009-2010/OHQ_F.htm. Data can be downloaded through: Oral Health (Data [XPT - 366 KB]) (April, 2012 last updated)

The data will represent 177,284,326 size in the population. The related oral health questions are,

Item Label	SAS Label
SEQN	Respondent sequence number
OHQ835	Do you think you might have gum disease?
OHQ845	Rate the health of your teeth and gums
OHQ850	Ever had treatment for gum disease?
OHQ855	Any teeth became loose without an injury
OHQ860	Ever been told of bone loss around teeth
OHQ865	Noticed a tooth that doesn't look right
OHQ870	How many days use dental floss/device
OHQ875	Days used mouthwash for dental problem

SEQN exists for every data set. This is the unique ID for every subject. When using the data to represent the  National Statistics, we need the following variables from the demographic data,

WTINT2YR	Full Sample 2 Year Interview Weight
WTMEC2YR	Full Sample 2 Year MEC Exam Weight
SDMVPSU	Masked Variance Pseudo-PSU
SDMVSTRA	Masked Variance Pseudo-Stratum

 The difference between the two weights is whether you will use the MEC exam data. If you need to use that data, the weight should be WTMEC2YR because of the additional missing values in the MEC exam data. If only use the interview questions, we need to use the following macro,


%macro wtfreq(indata,var);
proc surveyfreq data=&indata nosummary missing; 
 tables &var;
strata SDMVSTRA;
cluster SDMVPSU;
weight WTINT2YR;
run;
%mend wtfreq;

%wtfreq(indata, OHQ835);

Do you think you might have gum disease?
OHQ835	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
.  Missing	343	8325221	2196334	4.6960	1.3475
1 Yes	793	26011822	2366676	14.6724	0.7829
2 No	3977	140950470	9104115	79.5053	1.1760
7 Refused	1	20453	20453	0.0115	0.0114
9 Don't know	63	1976361	267363	1.1148	0.1587
Total	5177	177284326	10219592	100.000

The weighted frequency in the table represents the frequency in the population. In the above table, we can reach the conclusion that about 15% of the US population think why might have the gum disease.

Rate the health of your teeth and gums
OHQ845	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
. Missing	343	8325221	2196334	4.6960	1.3475
1 Excellent	545	22985973	2373436	12.9656	0.9643
2 Very good	922	39003006	2929386	22.0003	0.5978
3 Good	1719	61155864	4043994	34.4959	0.8821
4 Fair	1088	30471374	2057740	17.1879	0.7934
5 Poor	551	15177430	1455809	8.5611	0.5190
7 Refused	1	18371	18371	0.0104	0.0100
9 Don't know	8	147086	55579	0.0830	0.0317
Total	5177	177284326	10219592	100.000

We may reach the conclusion based on the above data like, nearly 8.6% of the population rate their health of teeth and gum as poor and only 35% rate them as excellent or very good.

You can make similar conclusion based on the below output form the data.

Ever had treatment for gum disease?
OHQ850	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
. Missing	343	8325221	2196334	4.6960	1.3475
1 Yes	1044	33739681	3079672	19.0314	1.5191
2 No	3769	134555226	9543820	75.8980	1.4850
7 Refused	1	18371	18371	0.0104	0.0100
9 Don't know	20	645827	226540	0.3643	0.1258
Total	5177	177284326	10219592	100.000

Any teeth became loose without an injury
OHQ855	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
. Missing	343	8325221	2196334	4.6960	1.3475
1 Yes	763	20719884	2078602	11.6874	0.8389
2 No	4067	148160937	9570586	83.5725	1.0564
9 Don't know	4	78285	22173	0.0442	0.0136
Total	5177	177284326	10219592	100.000

Ever been told of bone loss around teeth
OHQ860	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
. Missing	343	8325221	2196334	4.6960	1.3475
1 Yes	542	19298087	1399093	10.8854	0.5542
2 No	4257	148736540	10048259	83.8972	1.4345
9 Don't know	35	924478	174418	0.5215	0.0849
Total	5177	177284326	10219592	100.000

Noticed a tooth that doesn't look right
OHQ865	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
. Missing	343	8325221	2196334	4.6960	1.3475
1 Yes	778	20769060	1342029	11.7151	0.5357
2 No	4050	148083053	10084759	83.5286	1.2755
9 Don't know	6	106991	42415	0.0604	0.0242
Total	5177	177284326	10219592	100.000

How many days use dental floss/device of last 7 days
OHQ870	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
.	343	8325221	2196334	4.6960	1.3475
0	1808	54076766	3593763	30.5028	1.1700
1	313	12490459	1134092	7.0454	0.6062
2	436	16727807	1164811	9.4356	0.5075
3	368	14448550	1459178	8.1499	0.5492
4	270	11047692	1258998	6.2316	0.4305
5	175	7549817	926752	4.2586	0.4287
6	62	2842765	369731	1.6035	0.2194
7	1395	49673858	4245024	28.0193	1.0970
77	4	50979	27228	0.0288	0.0148
99	3	50411	34112	0.0284	0.0191
Total	5177	177284326	10219592	100.000

Days used mouthwash for dental problem of last 7 days
OHQ875	Frequency	Weighted Frequency	Std Dev of Wgt Freq	Percent	Std Err of Percent
.	343	8325221	2196334	4.6960	1.3475
0	2109	79796493	6331924	45.0105	1.4097
1	197	7135899	701857	4.0251	0.4390
2	304	10222261	916427	5.7660	0.3767
3	282	8965504	987258	5.0571	0.4088
4	178	7018847	887664	3.9591	0.4123
5	97	3797136	567744	2.1418	0.3437
6	39	1591065	377335	0.8975	0.2086
7	1620	50190107	3809085	28.3105	1.3582
77	3	38978	24440	0.0220	0.0132
99	5	202815	108603	0.1144	0.0630
Total	5177	177284326	10219592	100.000