INS and diabetes mellitus: Long-chain n-3 PUFA had little or no effect on diabetes diagnosis (RR: 1.00 [0.85–1.17]), HbA1c (−0.02 [−0.07 to 0.04]), plasma glucose (0.04 [0.02–0.07]), fasting insulin (1.02 [−4.34 to 6.37]), or HOMA-IR (0.06 [−0.21 to 0.33]).