Table 2. Associations between quintiles of frequency of vegetable intake and risk of prostate cancer.

	Quintiles of frequency of vegetable intake
	1 (low)	2	3	4	5 (high)	P for trend
Total vegetable intake
Total vegetable intake (serves per week)	1.0–8.0	8.3–11.9	12.0–15.5	15.8–20.5	20.9–33.0
Number of subjects	3113	3086	3103	3113	3056
Person-years	40 293	40 827	41 118	41 506	40 870
Number of events	28	22	31	26	36
Number of events (per 1000 person-years)	0.69	0.54	0.75	0.63	0.88
Age-adjusted	1.00	0.74 (0.42–1.29)	0.95 (0.57–1.58)	0.74 (0.44–1.27)	0.94 (0.57–1.55)	0.602
Multivariable-adjusteda	1.00	0.72 (0.41–1.26)	0.93 (0.56–1.56)	0.72 (0.42–1.24)	0.90 (0.54–1.48)	0.767
Multivariable-adjustedb	1.00	0.63 (0.36–1.10)	0.77 (0.45–1.30)	0.55 (0.31–0.96)	0.65 (0.37–1.12)	0.294
Green and yellow vegetable intake
Green and yellow vegetable intake (serves per week)	1.0–4.9	5.0–6.9	7.0–9.5	10.0–12.5	13.5–19.0
Number of subjects	2989	2928	3268	3423	2863
Person-years	39 213	38 865	43 386	45 730	37 420
Number of events	24	23	29	37	30
Number of events (per 1000 person-years)	0.61	0.59	0.67	0.81	0.80
Age-adjusted	1.00	0.88 (0.50–1.56)	0.95 (0.55–1.64)	1.01 (0.60–1.69)	0.92 (0.54–1.58)	0.740
Multivariable-adjusteda	1.00	0.86 (0.48–1.53)	0.92 (0.54–1.59)	0.98 (0.59–1.65)	0.87 (0.50–1.50)	0.913
Multivariable-adjustedb	1.00	0.76 (0.43–1.37)	0.76 (0.43–1.32)	0.76 (0.44–1.32)	0.61 (0.34–1.10)	0.200
Other vegetable intake
Other vegetable intake (serves per week)	0–1.9	3.0–3.5	3.9–5.0	7.0–8.5	10.5–14.0
Number of subjects	2762	3367	2798	3892	2652
Person-years	34 927	44 974	36 002	52 144	36 567
Number of events	23	26	28	39	27
Number of events (per 1000 person-years)	0.66	0.58	0.78	0.75	0.74
Age-adjusted	1.00	0.84 (0.48–1.48)	1.16 (0.67–2.01)	1.04 (0.62–1.74)	0.95 (0.55–1.66)	0.513
Multivariable-adjusteda	1.00	0.85 (0.49–1.50)	1.15 (0.66–2.00)	1.04 (0.62–1.75)	0.92 (0.53–1.62)	0.627
Multivariable-adjustedb	1.00	0.80 (0.45–1.41)	1.01 (0.58–1.78)	0.89 (0.52–1.52)	0.75 (0.42–1.36)	0.657

^aAdjusted for age, body mass index (kg m⁻²), ethanol intake (current drinker or not), smoking status (three categories), daily green tea intake (yes or no) and work schedule (rotating-shift or not).

^bAdjusted further for frequency of dairy products intake (quintiles), soy products intake (quintiles), fish products intake (quintiles) and beef intake (five categories).