Table 2.
Adjusted ORs and 95% CIs for oligo-astheno-teratozoospermia by intake of dairy products and their related nutrients.
| Variables |
Cases (N = 106) |
Controls (N = 581) |
Model 1b | Model 2c |
|---|---|---|---|---|
| Total dairya (g/day) | ||||
| T1 (<31.16) | 27 | 176 | 1.00 (Ref) | 1.00 (Ref) |
| T2 (31.16 – <135.66) | 35 | 205 | 1.11 (0.64–1.91) | 1.14 (0.65–2.01) |
| T3 (≥135.66) | 44 | 200 | 1.44 (0.86–2.45) | 1.53 (0.85–2.78) |
| P for trend | 0.14 | 0.14 | ||
| Protein (g/day) | ||||
| T1 (<0.95) | 27 | 173 | 1.00 (Ref) | 1.00 (Ref) |
| T2 (0.95 – <4.16) | 35 | 210 | 1.06 (0.62–1.84) | 1.09 (0.62–1.92) |
| T3 (≥4.16) | 44 | 198 | 1.43 (0.85–2.44) | 1.51 (0.84–2.75) |
| P for trend | 0.13 | 0.14 | ||
| Fat (g/day) | ||||
| T1 (<0.97) | 24 | 180 | 1.00 (Ref) | 1.00 (Ref) |
| T2 (0.97 – <3.64) | 37 | 205 | 1.36 (0.78–2.38) | 1.51 (0.85–2.71) |
| T3 (≥3.64) | 45 | 196 | 1.73 (1.02–3.00) | 1.93 (1.06–3.58) |
| P for trend | 0.05 | 0.05 | ||
| Calcium (mg/day) | ||||
| T1 (<36.44) | 28 | 180 | 1.00 (Ref) | 1.00 (Ref) |
| T2 (36.44 – <158.65) | 36 | 201 | 1.14 (0.67–1.96) | 1.15 (0.66–2.02) |
| T3 (≥158.65) | 42 | 200 | 1.37 (0.82–2.32) | 1.46 (0.81–2.66) |
| P for trend | 0.24 | 0.20 |
CI, confidence interval; OR, odds ratio; T, tertiles; Ref, reference.
aTotal dairy includes whole milk, skim/low-fat milk, cheese, and yogurt.
bModel 1: adjusted for age.
cModel 2: adjusted for age, body mass index, smoking status, household income, total energy intake, abstinence time, and dietary patterns except those for dairy products.