Trata-se de um estudo transversal, de base populacional, com 1.217 adultos, na faixa etária de 20 a 59 anos, na cidade de Viçosa, MG, 2014. A amostragem foi realizada por conglomerados em duplo estágio, sendo as unidades de primeiro estágio os setores censitários, e, em seguida, os domicílios. Foram sorteados 30 setores dentre os 99 de Viçosa, por meio de amostragem casual simples, sem reposição. A coleta de dados foi composta por aplicação de questionário contendo questões relativas a variáveis de SAC, sociodemográficas, comportamentais e de saúde. Para verificar as associações, apresentaram-se proporções, razões de prevalência e seus respectivos intervalos de confiança de 95%. A análise múltipla foi realizada por meio da regressão de Poisson, utilizando o conjunto de comandos svy do software Stata, o qual considera o efeito da expansão da amostra na análise dos dados.

Resultados:

A prevalência estimada de SAC foi de 31,27%, maior nas mulheres (18,45%). Estiveram associadas ao SAC as mulheres (RP 1,49; IC95% 1,23-1,81); as idades de 40 e 49 (RP 1,50; IC95% 1,16-1,92) e 50 e 59 anos (RP 1,55; IC95% 1,07-2,25); o sobrepeso (RP 1,60; IC95% 1,28-2,00); a obesidade (RP 1,60; IC95% 1,11-2,29); e aqueles que autorreferiram realização de trabalho pesado (RP 1,27; IC95% 1,09-1,48).

Conclusão:

O sexo feminino, a faixa etária de 40 a 59 anos, o sobrepeso, a obesidade e a realização de trabalho pesado foram fatores de risco para SAC em adultos de Viçosa, MG.

Palavras-chave:
inquéritos epidemiológicos; doenças reumáticas; articulações; adultos

Variable	Proportion (%)	Confidence interval (95CI)
Sex
Male	49.20	(45.73-52.67)
Female	50.80	(47.32-54.26)
Age range (years)
20-29	32.78	(24.34-42.50)
30-39	25.24	(21.07-29.91)
40-49	22.93	(18.30-28.31)
50-59	19.05	(15.10-23.74)
Skin color
White	39.60	(33.45-46.09)
Non-white	60.39	(53.90-66.54)
Education (years)
0-4	19.04	(12.32-28.23)
5-8	15.19	(11.30-20.11)
9-12	21.47	(18.09-25.29)
≥13	44.29	(32.57-56.67)
Social class (ABEP)
Upper (A and B)	24.53	(19.00-31.06)
Middle (C)	64.68	(59.92-69.16)
Lower (D and E)	10.77	(7.30-15.61)
Smoking
Non-smoker	65.47	(59.88-70.65)
Current smoker	16.17	(13.16-19.71)
Former smoker	18.35	(13.78-24.01)
Level of physical activity in leisure
Physically inactive	78.03	(71.37-83.49)
Physically active	21.96	(16.50-28.62)
Self-reported nutritional status^* * The nutritional status was obtained based on the ratio between body mass and squared stature, both self-reported. The cut-off points adopted were ≤ 25 kg/m2 = adequate; 25 kg/m2 to 29.99 kg/m2 = overweight; and ≥ 30 kg/m2 = obese.19
Adequate	50.98	(45.41-56.52)
Overweight	32.64	(28.61-36.95)
Obesity	16.37	(12.55-21.06)
High blood pressure
No	82.77	(78.69-86.20)
Yes	17.22	(13.79-21.30)
Diabetes mellitus
No	94.50	(90.39-96.91)
Yes	5.49	(3.08-9.60)
Family history of arthritis
No	94.65	(93.20-95.81)
Yes	5.34	(4.18-6.79)
Heavy work
No	66.66	(57.34-74.83)
Yes	33.34	(25.17-42.65)
Repetitive tasks
Never	28.30	(22.11-35.42)
Always	71.70	(64.57-77.88)

Variables	Frequency (%)	p-value^* * Chi-square test (p<0.05).
Sex		<0.01
Male	12.82
Female	18.45
Age range (years)		<0.01
20-29	6.47
30-39	8.26
40-49	8.41
50-59	8.13
Skin color		0.05
White	20.33
Non-white	10.94
Education (years)		<0.01
0-4	7.93
5-8	5.33
9-12	7.70
≥13	10.32
Social class (ABEP)		0.22
Upper (A and B)	6.42
Middle (C)	21.13
Lower (D and E)	3.75
Smoking habit		0.03
Non-smoker	19.29
Current smoker	4.18
Former smoker	7.80
Level of physical activity in leisure		0.01
Physically inactive	27.03
Physically active	5.66
Self-reported nutritional status^ The nutritional status was obtained based on the ratio between body mass and squared stature, both self-reported. The cut-off points adopted were ≤ 25 kg/m2 = adequate; 25 kg/m2 to 29.99 kg/m2 = overweight, and ≥ 30 kg/m2 = obese.19		<0.01
Adequate	11.49
Overweight	11.55
Obesity	8.25
High blood pressure		<0.01
No	23.68
Yes	7.59
Diabetes mellitus		0.14
No	29.39
Yes	1.50
Family history of arthritis		<0.01
No	28.34
Yes	2.73
Heavy work		<0.01
No	18.06
Yes	12.94
Repetitive tasks		<0.01
No	6.33
Yes	24.57

Variables	Gross prevalence ratio (95CI)	p-value	Adjusted prevalence ratio^* * All variables were adjusted.	p-value
Sex		<0.01		<0.01
Male	1.00		1.00
Female	1.39 (1.13-1.72)		1.49 (1.23-1.81)
Age range (years)		<0.01		0.02
20-29	1.00		1.00
30-39	1.66 (1.31-2.10)		1.30 (0.99-1.72)
40-49	1.86 (1.47-2.34)		1.50 (1.16-1.92)
50-59	2.16 (1.65-2.83)		1.55 (1.07-2.25)
Skin color		0.06		0.61
White	1.00		1.00
Non-white	1.22 (0.99-1.50)		1.07 (0.82-1.39)
Education (years)		<0.01		0.64
≥13	1.00		1.00
9-12	1.54 (1.25-188)		1.15 (0.76-1.74)
5-8	1.50 (1.19-1.89)		1.29 (0.74-2.24)
0-4	1.79 (1.30-2.45)		0.86 (0.55-1.35)
Social class (ABEP)		0.11		0.55
Upper (A and B)	1.00		1.00
Middle (C)	1.25 (0.99-1.58)		1.21 (0.94-1.56)
Lower (D and E)	1.33 (0.85-2.08)		1.06 (0.75-1.52)
Smoking habit		0.07		0.42
Non-smoker	1.00		1.00
Current smoker	0.88 (0.59-1.30)		0.90 (0.60-1.36)
Former smoker	1.44 (1.05-1.98)		1.11 (0.80-1.56)
Level of physical activity in leisure		0.15		0.42
Irregularly active	1.00		1.00
Physically active	0.84 (0.66-1.07)		1.12 (0.83-1.51)
Self-reported nutritional status^ The nutritional status was obtained based on the ratio between body mass and squared stature, both self-reported. The cut-off points adopted were ≤ 25 kg/m2 = adequate; 25 kg/m2 to 29.99 kg/m2 = overweight, and ≥ 30 kg/m2 = obese.19		<0.01		<0.01
Adequate	1.00		1.00
Overweight	1.59 (1.26-2.02)		1.60 (1.28-2.00)
Obesity	2.00 (1.37-2.92)		1.60 (1.11-2.29)
High blood pressure		<0.01		0.83
No	1.00		1.00
Yes	1.54 (1.25-1.90)		0.66 (0.30-1.44)
Diabetes mellitus		0.60		0.33
No	1.00		1.00
Yes	0.88 (0.53-1.44)		1.01 (0.71-1.56)
Family history of arthritis		0.01		0.09
No			1.00
Yes	1.37 (1.07-1.76)		1.23 (0.96-1.56)
Heavy work		<0.01		<0.01
No	1.0		1.00
Yes	1.43 (1.19-1.72)		1.27 (1.09-1.48)
Repetitive tasks		0.02		0.38
No	1.00		1.00
Yes	1.53 (1.08-2.17)		1.06 (0.92-1.22)

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E-mail: ramb@amb.org.br

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