Identifying the critical windows and joint effects of greenness and particulate matter exposures for preterm birth: a retrospective study across Guangdong Province in China from 2014 to 2018

Liang, Zhijiang; Meng, Fan-Shuo; Zhang, Yi; Qiu, Jialing; Xie, Lulu; Yao, Qian; Luo, Xianqiong; Zhou, Ji-Yuan

doi:10.1186/s12889-025-22890-2

Table 2 Basic characteristics of exposures within 500 m buffers around each mother鈥檚 residence each year

From: Identifying the critical windows and joint effects of greenness and particulate matter exposures for preterm birth: a retrospective study across Guangdong Province in China from 2014 to 2018

Year	Period	NDVI			听	FVC			听	PM_2.5 (碌驳/尘³)			听	PM₁₀ (碌驳/尘³)			听	TEMP (鈼)
Year	Period	25th	50th	75th	听	25th	50th	75th	听	25th	50th	75th	听	25th	50th	75th	听	25th	50th	75th
2014	Trimester1	0.260	0.303	0.373	听	0.322	0.378	0.481	听	32.97	39.73	45.55	听	53.77	60.17	68.85	听	18.48	20.66	22.32
	Trimester2	0.286	0.347	0.476	听	0.363	0.443	0.639	听	20.75	24.10	28.13	听	41.43	46.37	49.93	听	28.05	28.65	29.09
	Trimester3	0.305	0.369	0.467	听	0.394	0.481	0.627	听	36.08	43.10	49.50	听	60.83	68.63	76.30	听	21.21	25.37	27.07
	Entire Pregnancy	0.284	0.345	0.434	听	0.364	0.437	0.584	听	32.27	34.84	39.04	听	54.40	58.45	62.56	听	23.78	24.37	24.85
2015	Trimester1	0.260	0.323	0.436	听	0.325	0.417	0.572	听	30.03	38.08	47.30	听	50.20	59.70	71.87	听	18.87	22.38	27.42
	Trimester2	0.269	0.341	0.448	听	0.335	0.441	0.585	听	25.27	36.83	46.20	听	42.83	58.03	70.07	听	18.98	25.04	27.94
	Trimester3	0.278	0.352	0.460	听	0.349	0.457	0.605	听	26.30	33.23	42.03	听	43.93	52.43	64.58	听	19.52	25.01	27.75
	Entire Pregnancy	0.278	0.333	0.460	听	0.351	0.428	0.582	听	33.32	36.85	40.66	听	53.42	58.55	63.12	听	22.22	23.03	24.12
2016	Trimester1	0.269	0.337	0.442	听	0.336	0.437	0.576	听	28.30	33.03	36.93	听	45.23	51.00	56.38	听	18.19	22.17	27.31
	Trimester2	0.275	0.337	0.439	听	0.356	0.451	0.596	听	25.25	31.40	35.55	听	42.53	48.95	54.55	听	18.68	25.81	28.11
	Trimester3	0.279	0.344	0.445	听	0.365	0.459	0.600	听	25.93	31.23	35.37	听	42.90	48.67	54.35	听	18.88	24.73	27.81
	Entire Pregnancy	0.283	0.336	0.436	听	0.369	0.442	0.581	听	28.48	31.22	34.09	听	45.60	49.35	53.28	听	21.86	22.75	23.92
2017	Trimester1	0.281	0.343	0.444	听	0.367	0.458	0.593	听	26.07	33.23	39.08	听	43.73	52.97	61.55	听	19.47	22.66	27.75
	Trimester2	0.288	0.350	0.456	听	0.364	0.455	0.594	听	24.15	32.05	38.58	听	41.70	51.33	59.95	听	19.46	24.24	27.43
	Trimester3	0.283	0.346	0.450	听	0.358	0.451	0.587	听	24.17	31.57	39.57	听	42.00	51.97	61.83	听	18.86	23.97	27.57
	Entire Pregnancy	0.290	0.341	0.451	听	0.374	0.440	0.594	听	29.38	32.20	35.73	听	47.78	51.92	56.92	听	22.27	23.21	24.10
2018	Trimester1	0.296	0.352	0.456	听	0.377	0.461	0.594	听	26.40	34.38	40.55	听	45.70	55.63	62.75	听	18.62	22.37	27.47
	Trimester2	0.279	0.331	0.437	听	0.352	0.425	0.567	听	22.93	36.20	43.15	听	41.23	56.95	64.70	听	17.09	19.70	26.97
	Trimester3	0.281	0.337	0.445	听	0.350	0.429	0.579	听	22.40	27.15	32.70	听	40.10	47.10	54.67	听	21.93	24.97	27.18
	Entire Pregnancy	0.289	0.338	0.449	听	0.366	0.434	0.583	听	29.41	32.36	35.87	听	48.90	52.70	56.99	听	21.83	22.45	23.35

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Table 2 Basic characteristics of exposures within 500 m buffers around each mother鈥檚 residence each year

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