Ciência & Saúde Coletiva

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THEMATIC ARTICLE • Ciênc. saúde coletiva 31 (suppl 1) • 2026 • https://doi.org/10.1590/1413-8123202631.13912024 linkcopiar

Crononutrição: investigando os determinantes e a importância das variáveis nos horários de alimentação entre adultos brasileiros

Autoria SCIMAGO INSTITUTIONS RANKINGS

Este estudo objetivou explorar fatores fisiológicos, comportamentais, preferências pessoais, culturais e ambientais que influenciam o horário de alimentação. Com dados de 5.260 adultos brasileiros de uma pesquisa virtual (Sonar-Brasil/2023-24), a regressão Lasso identificou os determinantes dos horários do primeiro e último episódio alimentar, almoço, ponto médio da alimentação e frequência de pular o café da manhã. A análise Random Forest avaliou a importância das variáveis para o ponto médio da alimentação. O cronotipo foi o principal preditor: à medida que se deslocava para a vespertinidade, aumentava a frequência de pular o café da manhã e os horários de alimentação eram mais tardios. Depressão, obesidade, tempo de tela à noite, tabagismo, cafeína, ter o jantar como a maior refeição, sono curto e trabalho remoto foram associados ao atraso do ponto médio da alimentação. Já idade, sexo feminino, exercícios, consumo de álcool à noite, qualidade da dieta, trabalho presencial e maior escolaridade foram associados ao seu adiantamento. Compreender os fatores modificáveis do horário alimentar pode auxiliar na criação de intervenções de saúde pública que promovam hábitos alimentares saudáveis, alinhados ao sistema circadiano e adaptados a contextos regionais e individuais.

Palavras-chave:
Horário das refeições; Ritmo circadiano; Crononutrição; Ingestão alimentar

Variables	Total	Eating Midpoint
Variables	Total	Tertile 1	Tertile 2	Tertile 3	P-value
Eating Midpoint, decimal time	14.69±1.23	13.45±0.49	14.56±0.27	16.05±0.90
First eating, decimal time	8.22 1.65	7.05±0.79^a,b,c	7.84±0.86^a,b,c	9.79±1.69^a,b,c	<0.001
Lunch time, decimal time	12.61 0.77	12.38±0.62^a,b,c	12.60±0.64^a,b,c	12.86±0.93^a,b,c	<0.001
Last eating, decimal time	21.15 1.46	19.86±0.93^a,b,c	21.29±0.87^a,b,c	22.31±1.31^a,b,c	<0.001
Age, years	36.39±12.40	39.19±12.42^a	36.86±12.35^a	33.09±11.65^a	<0.001
18-29 years, %	36.18	24.70	31.27	44.04	<0.001
30-49 years, %	46.16	36.66	34.39	28.95
50-65 years, %	17.66	42.84	35.09	22.07
Sex, %
Female	70.32	34.77	33.82	31.41	<0.001
Male	29.68	30.24	32.35	37.41
BMI, Kg/m²	25.66 ± 4.92	25.60±4.67	25.54±4.77	25.86±5.31	0.12
Nutritional Status, %
Normal (BMI<25Kg/m²)	50.82	33.26	34.27	32.47	0.009
Overweight (BMI:25-29.9Kg/m²)	32.66	34.87	33.41	31.72
Obesity (BMI>29.9Kg/m²)	16.52	31.07	30.61	38.32
Depression, %
Yes	13.57	26.47	30.25	43.28	<0.001
No	86.43	34.51	33.88	31.61
Physical exercise, %
Yes	73.19	35.19	34.68	30.13	<0.001
No	26.81	28.58	29.86	41.56
Timing of Physical Exercise, %
05 am to 11 am	39.60	40.47	36.68	22.85	<0.001
11 pm to 18 pm	37.22	32.07	35.24	32.69	0.07
After 18 pm	25.34	28.51	35.33	36.16	<0.001
Screen time before bed, min	73.63±68.10	66.86±67.19^a	71.23±68.97^b	82.84±67.17^a,b	<0.001
Tobacco smoking, %
Yes	5.82	16.99	32.03	50.98	<0.001
No	94.18	34.44	33.47	32.10
Alcohol consumption after 6 pm, days/week	1.07±1.48	0.96±1.41^a,b	1.12±1.51^a	1.14±1.52^b	<0.001
Caffeine consumption, times/day	2.36±1.57	2.13±1.45^a,b	2.37±1.48^a,c	2.57±1.75^b,c	<0.001
Diet quality, score	49.17±9.13	51.49±8.67^a,b,c	49.37±8.89^a,b,c	46.62±9.16^a,b,c	<0.001
Low (1^st tertile), n (%)	34.30	23.61	32.32	44.07	<0.001
Intermediate (2^nd tertile), n (%)	35.68	33.30	35.16	31.54
Good (3^rd tertile), n (%)	30.02	44.78	32.49	22.74
Skipping Breakfast, days/week	1.05±2.17	0.20±0.86^a,b,c	0.53±1.47^a,b,c	2.41±2.90^a,b,c	<0.001
Largest meal, %
Breakfast	5.80	45.25	35.08	19.67	<0.001
Lunch	80.13	34.00	34.35	31.65
Dinner	8.38	20.63	23.36	56.01
None	5.51	32.76	32.76	34.48
Snacks	0.17	11.11	33.33	55.56
Chronotype (MSFsc), decimal time	27.38±1.31	26.57±0.96^a,b,c	27.31±0.99^a,b,c	28.28±1.34^a,b,c	<0.001
Early (<p25)	33.61	59.95	27.71	12.33	<0.001
Intermediate (p25-p75)	33.61	30.66	44.34	25.00
Late (>p75)	32.78	9.05	27.96	62.99
Wake time, decimal time	6.80±1.18	6.08±0.82^a,b,c	6.70±0.83^a,b,c	7.61±1.29^a,b,c	<0.001
Bedtime, decimal time	23.33±1.21	22.51±0.96^a,b,c	23.26 0.85^a,b,c	24.23±1.12^a,b,c	<0.001
Sleep Duration, hour	7.46±1.11	7.57±1.03^a,b	7.44±1.05^a	7.38±1.24^b	<0.001
<7 hours/night, %	29.94	26.79	34.22	38.98	<0.001
≥7 hours/night, %	70.06	36.26	33.03	30.72
Work setup, %
Do not work, %	17.98	27.17	29.18	43.66	<0.001
Remote work, %	25.11	29.45	35.96	34.60
In-office work, %	56.90	37.15	33.58	29.27
Graduation, %
Yes	71.29	35.39	34.85	29.76	<0.001
No	28.71	28.54	29.74	41.72
Married/Stable Union, %
Yes	43.40	39.25	35.26	25.49
No	56.60	28.96	31.94	39.10	<0.001
Season, %
Winter	12.78	37.20	35.12	27.68	<0.001
Spring	18.84	36.63	30.68	32.69
Summer	9.60	44.75	25.15	30.10
Autumn	58.78	29.72	35.22	35.06

Variables		Standardized Coefficients
Variables		Breakfast Skipping	First Eating	Lunch Time	Last Eating	Eating Midpoint
Physiological	Age, years	-0.1427	-0.0085	0.0746	-0.0574	-0.0299
	Sex, Female	-0.0829	0.0117	0.0564	-0.0721	-0.0248
	Depression, yes	0.0475	0.0120	0.0019	0.0332	0.0232
	Obesity, yes	0.0904	0.0837	----	-0.0319	0.0161
Behavioral and Personal Preference	Morning Exercise (between 5 and 10am), yes	-0.1424	-0.1343	-0.0158	-0.0059	-0.0673
	Evening Exercise (after 6pm), yes	-0.0761	-0.0755	----	0.0289	-0.0117
	Screen Time before bedtime, min	0.0509	0.0288	----	----	0.0100
	Smoking, yes	0.1525	0.1174	0.0127	0.0247	0.0703
	Evening Alcohol Consumption, days/week	-0.0011	-0.0225	-0.0029	----	-0.0039
	Caffeine Consumption, freq/day	-0.1067	-0.0413	----	0.1012	0.0269
	Diet Quality, score	-0.2416	-0.1192	----	-0.0467	-0.0837
	Largest Meal is Dinner/Supper, yes	0.2306	0.1584	0.0537	0.0626	0.1086
	Chronotype (MSFsc), decimal time	0.3366	0.7383	0.2166	0.6083	0.6757
	Short Sleep Duration (<7h), yes	0.1106	-0.0872	0.0596	0.2954	0.0989
Cultural and Environment	Brazil’ s Region (reference: Northeast)
	North	-0.0516	0.0213	-0.0181	0.0047	0.0008
	Midwest	0.0729	0.0654	-0.0439	-0.0390	----
	Southeast	-0.0249	0.0697	-0.0026	-0.0252	----
	South	0.0471	0.0812	-0.0785	-0.0337	0.0011
	Work Setup (reference: do not work)
	Remote work	-0.0473	0.0249	0.0221	----	0.0032
	In-office work	-0.0312	-0.0410	----	----	-0.0240
	Education, graduated	-0.0550	-0.0767	-0.0127	----	-0.0318
	Marital Status, married/stable union	----	-0.0137	----	----	----
	Season, Winter/Autumn	-0.0806	-0.1314	----	0.1456	0.0070

Variables	Total	North	Northeast	Midwest	Southeast	South	P value
Variables	n (%)	5,260 (100)	479 (9.11)	1,446 (27.49)	418 (7,95)	2,166 (41.18)	751 (14.28)
First Eating*	8.22±1.65	8.08±1.41^a	8.09±1.68^b,c	8.24±1.67	8.27±1.66^b	8.43±1.68^a,c	<0.001
Tertile 1	33.75	33.40	38.38	36.36	32.50	27.16	<0.001
Tertile 2	34.47	36.12	32.64	32.06	33.84	40.08
Tertile 3	31.79	30.48	28.98	31.58	33.66	32.76
Lunch Time*	12.61±0.77	12.59±0.65	12.65±0.76^a,b	12.45±0.73^a,c	12.68±0.82^c,d	12.46±0.69^b,d	<0.001
Tertile 1	40.63	35.91	37.68	48.33	38.83	50.20	<0.001
Tertile 2	28.42	34.66	28.35	27.99	26.78	29.56
Tertile 3	30.95	29.44	33.96	23.68	34.40	20.24
Last Eating*	21.15±1.46	21.33±1.38^a,b	21.07±1.49^a	20.96±1.37^b,c	21.19±1.48^c	21.18±1.40	<0.001
Tertile 1	34.68	28.60	36.31	42.82	33.98	32.89	<0.001
Tertile 2	32.55	35.07	29.88	31.34	33.47	34.09
Tertile 3	32.78	36.33	33.82	25.84	32.55	33.02
Eating Mipoint*	14.69±1.23	14.71±1.09	14.58±1.24^a,b	14.60±1.16	14.73±1.26^a	14.81±1.20^b	<0.001
Tertile 1	33.42	30.48	37.62	36.12	32.96	27.03	<0.001
Tertile 2	33.38	34.86	31.33	32.54	33.15	37.55
Tertile 3	33.19	34.66	31.05	31.34	33.89	35.42
Largest meal
Breakfast	5.80	5.64	8.09	5.50	5.22	3.33	0.001
Lunch	80.13	82.25	77.94	81.10	80.29	82.02
Dinner	8.38	6.26	9.27	6.22	8.59	8.66
None	5.51	5.85	4.63	6.70	5.72	5.73
Snacks	0.17	0.00	0.07	0.48	0.18	0.27

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