Table 1.

Weighted distribution of the original items related to oral health-related quality of life

Oral health-related quality of life questions	Weighted frequency	Standard deviation	Percent	Standard error of percent
Q1 Painful activity in the mouth
4 = Often	13,755,543	1,460,238	6.73	0.48
3 = Occasionally	25,128,226	2,013,694	12.30	0.61
2 = Hardly ever	42,636,848	3,780,291	20.87	1.06
1 = Never	122,768,565	8,556,598	60.10	1.22
Q2 Life less satisfying because of oral problems
4 = Often	9,666,526	1,160,051	4.73	0.36
3 = Occasionally	11,641,547	1,190,583	5.70	0.39
2 = Hardly ever	17,505,766	1,471,936	8.57	0.42
1 = Never	165,475,343	11,068,539	81.00	0.82
Q3 Difficulty doing usual jobs or attending school because of oral problems
4 = Often	3,023,349	542,861	1.48	0.23
3 = Occasionally	4,200,819	483,792	2.06	0.23
2 = Hardly ever	9,475,600	861,084	4.64	0.30
1 = Never	187,589,414	12,932,951	91.83	0.56
Q4 Uncomfortable eating any food because of oral problems
4 = Often	3,969,630	781,556	1.94	0.36
3 = Occasionally	5,309,418	627,190	2.60	0.27
2 = Hardly ever	8,053,339	971,541	3.94	0.32
1 = Never	186,956,795	12,678,172	91.52	0.49
Q5 Sense of taste affected because of oral problems
4 = Often	13,096,247	1,508,461	6.41	0.64
3 = Occasionally	20,859,177	2,236,911	10.21	0.64
2 = Hardly ever	16,919,789	1,076,817	8.28	0.54
1 = Never	153,413,968	10,929,286	75.10	0.87
Q6 Avoided particular foods because of oral problems
4 = Often	11,892,496	1,399,645	5.82	0.48
3 = Occasionally	23,879,152	2,399,654	11.69	0.56
2 = Hardly ever	21,196,021	1,988,158	10.38	0.62
1 = Never	147,321,513	9,372,732	72.11	0.96
Q7 Self-conscious or embarrassed because of oral problems
4 = Often	13,349,033	1,537,101	6.53	0.51
3 = Occasionally	13,083,742	1,299,563	6.40	0.54
2 = Hardly ever	13,548,754	1,143,398	6.63	0.26
1 = Never	164,307,652	11,157,718	80.43	0.65
Total	204,289,182	13,958,362	100.00